How would you rank each quadrennial by considering all the depth, talent and results for US ladies for each quadrennial starting with 1981?
1981 - 1984 : Sumners, Zayak, Chin, De Vries
1985 - 1988 : Thomas, Trenary, Kadavy, Chin
1989 - 1992 : Yamaguchi, Harding, Trenary [until 1990], Kerrigan
1993 - 1994 : Kerrigan, Harding, Erven, young jr. Kwan, Kwiatkowski
1995 - 1998 : Kwan, Lipinski, Bobek, Kwiatkowski
1999 - 2002 : Kwan, Hughes, Cohen, Nikodinov, Kirk
2003 - 2006 : Kwan, Cohen, Hughes [2003 only], Meissner, Kirk, Czisny 
2007 - 2010 : Meissner, E. Hughes, Flatt, Nagasu, Zhang, Czisny, Wagner.
1) 1989 - 1992: Yamaguchi, Harding and Trenary were all Nats. Champs in this quadrennial. Yamaguchi won '91 and '92 worlds along with the gold in Albertville '92, doing 3z-3t by '92. US ladies swept the podium at '91 Worlds. Harding is possibly the most talented tech lady skater ever, being the 1st US lady to do a 3x in winning '91 nats and '91 Worlds silver medal but would fall apart in the years afterwards. Trenary was '89 Worlds bronze medalist and '90 World Champ but wouldn't stick around due to injury, but due to the depth in talent may not have even made the team had she done so. Kerrigan got Bronze in Munich '91 and Albertville '92, then silver in Oakland '92.
2) 1995 - 1998: This was IMO one of the most talented and results-giving quadrennial for US ladies. Kwan, Lipinski, Bobek all US Nats Champs. Kwan and Lipinski '96 and '97 World Champs. Bobek got Bronze in '95 after leading in the SP. Kwan with some legendary programs, Lipinski with up-to-that-time the most difficult 3l-3l combo. Kwan and Lipinski going 1-2 at '98 Nagano Olympics both with 7 triple performances.
3) 1999 - 2002: Kwan swept Nats thru this period which is grand but perhaps showed the US didn't have as an incredible amount of depth as the above [or maybe Kwan was just too much for US competition]. Still, Kwan's results in this quadrennial keeps it ranked high IMO; '99 World silver medalist, '00 and '01 World Champions with perhaps her best performances ever. Hughes would step in to win the Olympic crown in '02 at SLC to give the US added depth. Kwan was '02 World silver medalist and '02 Olympic Bronze medalist. I rank below the other 2 because besides Cohen at the end of this quadrennial, there was no one else really. Nikodinov never really delivered despite the promise shown at '01 Nats
4) 1981 - 1984: Zayak and Sumners were Nats. Champions in these years and each would win Worlds in '82 and '83 respectively. Tiffany Chin would really come into her own, too, by '84 with a 3f and a great combo of artistry and athleticism. Zayak revolutionized the use of triple jumps by ladies. But I rank lower than the above 3 quadrennials because the results were not as great by Sarajevo '84 with no gold because Roz lost to Witt and Zayak faded after her '83 injury.
5) 1985 - 1988: Thomas, Trenary and Chin all won Nats titles in this quadrennial showing great depth. Thomas was '86 World Champ (that would be her highest attainment), '87 World Silver medalist but would be the first top US lady to do a 3t-3t and 3l. Chin in the twilight of her career would get 2 bronzes at '85 and '86 Worlds but without nothing harder than 3t's. Kadavy would win a bronze at '87 worlds utilizing the 3l in various combinations with beautiful artistry. I rank lower than the above because even with 4 great ladies, Thomas's '86 win was the high point and the US ladies basically tanked by Calgary '88. Kadavy and Trenary never really got it together in this quadrennial.
6) 2003 - 2006: Kwan continued her reign thru most of this quadrennial at then Nationals level, but at a lesser technical level, and her biggest competition was a talented Cohen who could never really deliver when it mattered most. Hughes was basically a non-starter after SLC '02. Kwan with '03 Worlds win was the highlight, although Cohen with Silver medals from '04 - '06 added some depth. Meissner winning '06 Worlds with 2 3-3s was great, but may be not so memorable and was her first and last.
7) 1993 - 1994: Mini-quadrennial. No medalists at '93 Worlds with all of Kerrigan, Erven and Kwiatkowski tanking. Kerrigan winning a silver in Lillehamer '94 when she perhaps should've just won the whole thing, and Harding who still showed flashes of technical brilliance keeps this team of US ladies from being ranked last.
8) 2007 - 2010: No medalists at all at any point in this quadrennial, although there were flashes of talent. The US was a side note in the various world and Olympic competitions