Use Telerik/Infragistrics over build in controls

Jeffrey Palermo has the following gem :" use Infragistics/Telerik over in-the-box controls" .
I strongly disagree. 3rd party asp.net controls are usually awful...they spit our crappy large html and javascript which doesn't work on all browsers. Better stick with the default ones (not that they are perfect but they suck less). I had once made a test with a tab control : a "hand made" tab control (html and css) placed on a empty aspx page resulted in a 3kb html. Same thing with a Telerik tab control resulted in a whooping 12kb.
The idea is that if you can accomplish something with a HTML control then DO IT. Use server side controls only when you absolutely need them.