Bottom line is this, ten minutes is too long. If you want to just keep trading these things among yourselves fine, if you want these to actually be widely used in the real world this problem has to be solved. And no I'm not letting anyone walk off with my stuff with zero confirmations, or even just one confirmation. And my customer isn't going to sit there for an hour to wait to leave with the stuff he's trying to buy. Bitcoin with 10 minute confirmations is a niche currency for certain internet transactions, at best.
Are you just stating this as a general problem or are you suggesting that SolidCoin solves/helps with this problem? SolidCoin has 3 minutes between blocks, right? I don't see how that makes much of a difference. The thing is, you still need to take variance into account. Sure, on average you have a block every 3 minutes. But that means that for a 95 % chance of finding a block, you need to wait about 9 minutes (math here:
http://www.wolframalpha.com/input/?i=-log%281-0.95%29%2F%281%2F3minutes%29 ). Which in turn means, that in 5 % of the cases you actually have to wait even longer than 9 minutes. So what have we really gained?
Sure, there might be situations where "wait for a little while" (SolidCoin) is acceptable, whereas "wait for quite some time" (Bitcoin) would not be. But I can't think of that many situations to see this as much of an advantage.