I've said it before if Sonar would update the gui of the sonitus plugins...there would be many people swear they sound better. (those are pretty good plugins.)
I believe that most of those comps in the list are very good, and a "pro" mixer could get "pro" results with any of them.
What happens in these polls is people vote for what they use. MJUC and Kotelnikov are pretty cheap and probably have many users. (Users = Votes).
I love MJUC and Kotelnikov and about 20 others I have, but they don't compare with the beast that is Pro-C2. (I don't own Pro-C2)
I use the compressors that are fast and simple, because I don't think it matters much either way. If I need to shave off a db or two. No one will know which one I used by listening.
I do like to see the small independent Devs get some credit for quality work.