Hmm...
Jonny, out of interest are there any mentalists you've seen that have impressed you? I assume you've heard of the same magis/mentalists that most people have (the ones that have made it to tv basically), when you watch them do you find them interesting and entertaining or annoying and puzzlesome?
The reason I'm asking is that the general impression you project is of a cynical person who probably doesn't like to be 'tricked'. Entertained certainly, but not deceived in the context of what was presented at the show you went to. This guy certainly seems to be a modern mentalist (everyone else: can we agree with that for now for the purposes of this thread?) although his marketing could be construed as a bit awry, selling clothes with your logo on isn't an obvious choice for the discerning mind reader. You say you went to the show with low expectations so I imagine you're the sort of spectator who instantly feels on the back foot when you're presented with a magic trick.
Don't worry, you're not alone and it's the performer's job to get you on their side and enjoying the show. In this case the guy didn't manage to, so it was his fault. However, as others have pointed out above it's highly unlikely that any stooges were used, simply because there's no need for him to have done so to have achieved the effects you mentioned. The use of the same volunteers could have been for several reasons and as Soren said he should have made it clear why he did this, after all the main aim of any well constructed routine is to remove all possible logical pathways to the method, leaving a miracle. In mentalism particularly the use of confederates is a logical assumption to make so ruling them out is an important part of any effect where they could be brought into play, again he failed to do this.
It would appear that you either saw the chap on an 'off night' or he's not that good. I must admit that the clips you posted gave me the impression he was technically proficient but somehow a bit annoying, not sure quite why. Thing is, you couldn't explain what he did without resorting to the assumption that his volunteers were "obvious" stooges, so maybe he did do his job right
EDIT: I've just re-read your last post and have something to say regarding the selection of the volunteers. It's not at all out of the ordinary for spectators to be reluctant to be selected and some well regarded magicians even say that you should always avoid anyone who's clearly gagging to be picked. On the same note, a magician called Darwin Ortiz says in his seminal treatise on performance Strong Magic that you should decided yourself which members of the audience you wish to use and virtually drag them onto the stage in the most polite way possible. Again in a mentalism performance there are slightly different aspects to take into account but this could go some way to explaining why he acted as he did.
The artist who does not rise, descends.