Over on AVS forums we had a broader discussion about this a few years ago. I wrote "discussion" to make it sound rational, adult, and civilized; it was more like a cock fight.
Surprisingly, the group in the discussion trended toward DTS solutions over Dolby solutions, L7, Cirrus Extra Surround, SRS Circle Surround, or Sony Dynamic Digital Sound. However, part of that can be attributed to the influence of industry plants and dealers in those forums. Among the few who openly defied the DTS juggernaut were me and Roger Dressler of Dolby labs. At least he's very open about where he works, and he knows the system inside and out.