As someone who is very close to both of the topics he's discussing (bootstrapping and customer development), I'd like to point out something obvious that the author has apparently missed: they're not the same thing. You can raise money and do customer development, and you can bootstrap with your head in the sand and never talk to your potential customers.

The value of customer development is that it's a model for being more efficient with whatever resources you have as you search for a fit between your product and the market.