I wouldn't necessarily say "not to worry about it" -- though I agree with your point. For example problem #1 -- "too many database calls" (and the related #4 "w

I wouldn't necessarily say "not to worry about it" -- though I agree with your point. For example problem #1 -- "too many database calls" (and the related #4 "wrong use of O/R mappers") are good warnings to those either just starting out in a new project, or in web development at all. Sure -- don't go crazy optimizing your app just yet, but for goodness sakes -- turn on SQL query time reporting and have a glance at what your app is doing...