Nope. Although I didn't run them like I did on Liberty, the Champion and Infinity servers had slightly more people doing incarnate content on a more regular basis than Liberty.
Yeah, I rarely had trouble finding an iTrial to join on Infinity (where I almost exclusively played, at least until I started doing the Beta server thing). Unless the server was simply slow, there were always people assembling iTrials.
I enjoyed them for the most part. My only real complaints were twofold:
1) The difficulty in getting the story content out of them. Someone elsewhere mentioned having the same problem with regular Trials/Taskforces, to which I'd agree. I think a big difference for me, at least, is that it seemed there was so much more content in the iTrials, or at least certainly more content that I found relevant, as it directly tied into the ongoing (at that point) storyline in the game- and the fact that I was a Praetoria fanatic. So that was disappointing to me.
2) This goes along with #1, but it seemed everyone always ran the same iTrials- BAF, Lambda. To a lesser extent Keyes and MoM. I only ever got to participate in an Underground Trial once (and it ended when too many people dropped), a Magisterium once (ended when everyone dropped with only two bosses remaining at the end), and never a Diabolique or TPN. I'm sure Magisterium would have changed, as it seemed people were starting to get the hang of it and run them a bit more often before the end.
I also didn't feel like I was able to participate so much in either Keyes or Lambda. Lambda especially- running around those interior maps, looking for glowies to click while everyone just runs ramshod all around and you keep running into masses of enemies who lay you flat every time. Part of it was probably my system that couldn't quite keep up, but it also seemed like any teamwork to that point (and after that point) went out the window, and suddenly it was every man for himself against hordes of Incarnate level foes. Ouch.