Part of the reason the tsunami relief was so quick is that they announced 1000's of ESTIMATED deaths and quickly reached up to 100,000+ dead. Plus, at least 50% to 90% of the larger tsunami cities were still intact and the water receded quickly. There was still infrastructure to launch relief efforts and aid from. Plus, the 100,000+ dead didn't need food, water, and shelter. In fact, there was initially extra food for the survivors because the dead were no longer there to eat it. Plus, the locals still had homes because they couldn't afford to live in the tourist areas near the beach. Completely different situation and logistics.
It is hard for people to understand the severity of the situation when all week we hear 40 confirmed deaths and then eventually up to 50 confirmed deaths and so on. IF they had started out estimating 10,000+ dead or missing, the american people would have mobilized quicker. Now, who wants to help out when all they see on TV is looters and thugs?