I've had problems with Drupal so it's not that great. ;)
i'm thinking dizzy is an unpaid intern for drupal. "You Suck!!!" hahaha. really breaks down the issues he's been having.
Heh, well, the good thing about open source is that we're all free to choose. But, yes, I would pay more attention to a more articulate criticism.
The issues that he/she and a lot of other people have been having are related to http://open.silverstripe.com/ticket/2827 - I think we'll need to give it some attention in 2.4.0. Unfortunately it will mean another class rename that people will have to deal with if they've referenced HTTPResponse in their own code, but that's life. :-(