Infrastructure? What makes you think that MtGox past troubles in coping with demand will having anything to do with the patterns of future adoption?   This was when Bitcoin had a central point that could be swamped like that. We are already seeing that change, we are already seeing the infratstructure rise, and it will only start coming faster. New exchanges popping up, many only in beta, and of course OpenTransactions stands to change the whole game. Infrastructure will rise to meet the demand much faster than you think because there is so much profit potential.
You underestimate the power(and speed) of hype, greed, competition, and logical thinking when applied to a digital free market with sound foundations.
Rome wasn't built in a day because they had to lug around rocks.