Most of these points strike me as contrary to traditional lean startup advice--e.g. it's ok to expend a huge amount of resources without seeing results for 5-7 years, and it's important to be first in a big market.

Obviously, this worked for Amazon, and there are some opportunities you won't be able to take advantage of in any other way, but it's certainly high risk. I mean, Pets.com arguably followed much of this advice.

I suspect what really separates Amazon from the pack is their actual customer experience--but that's only 1 of 6 points here.