I doubt it. I play mobile games quite a lot and I've never even heard of those. TIGforums are rather elite too, more for game developers than buyers.
Facebook and Twitter are for everyone. I have serious doubts about how effective social networking really is in converting to sales. But it just plain works in getting your game's name around. If you have something that's attractive on sight, it'll work. If it doesn't stand out, it probably won't.
If there's a niche site for it.. like a touchphone RPG guild, or retro-gamers club.. you'll probably get few people seeing it, but the ones who go to such sites are often very willing to pay (if a tad picky). It's really dependent on the groups themselves.
Toucharcade is actually worth pursuing because Apple keep tabs on the front page articles. If a game is making headway there then they will feature it in some form or another. The more noise you can get out the more Apple will here about your game - getting a feature will do wonders to the sale of a game.
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