I usually don't mind commentary between skaters, but definitely don't want to hear it DURING the skate.
Where I mind it between skaters is if it's all trash talking. We sat in front of some folks at Skate America and they were big fans of certain competitors. All they could do was compare others to their faves and discuss how their faves were SOOOO much better. Unfortunately when their absolute favorite had a less than stellar performance, the comments got nastier and nastier.
It's too bad now, because while I was neutral on their favorite before the competition, they were so obnoxious that I now can't bring myself to root for their skater. Definitely not the skater's fault, but I can't help it.