I'm sure the "oh well, you were stupid enough to trust an exchange so you deserve to loose your money, now on with bitcoin for those of us that didn't loose our btc" atitude has something to do with a major segment of would-be BTC promoters keeping quite and moving on with their lives.
That would be fine for a mature BTC economy but anyone that thinks that is where BTC is yet has more learning to do than those that lost their money on MtGox.
Right, the "don't keep your money on an exchange" mantra may likely hurt the price because without money on exchanges people are not buying. Eventually the miners who need to sell to cover their massive overheads will need to sell.
My guess is the major miners have silently agreed that they would hold their bitcoin for a while after the gox debacle so that there wouldn't be excessive sell pressure driving the price down.
No question that a very reliable and safe exchange must be created on US soil for new players to feel confident enough to entrust money with exchanges for buying bitcoin.