I have often heard a couple of things on forums, that is hard to find an good match of equal skill and casuals dont care about the settings, thus dont mind the TU.
If you would like to test those two theorys, I have a suggestion for you. Jump on Reach, dont invite any of your buddies and select TS and hold on to your skirt. Watch for two things, how many times you play the TU and how well you do as apposed to when you are partied up. Just for funnzies =P
Searching with randoms on good or bad settings has nothing to do with how well the players will do. Randoms are going to bad (usually) regardless if you vote TU or standard Reach. loltrue skill will screw you over as it usually does by pairing you with living dead kids and the other gets decent players.