In WPF you have a grid layout out of the box. It just works. It takes minutes to setup. In HTML you are forbidden from using table and divs require all sort of third-party crap that doesn't really work with scaling windows and such. Tried using Twitter BootStrap fluid. Had to tweak the thing for days. Still not happy.
Why is it important that it's "in the box". You can have a html page started with a link to foundation and be doing a progressive grid layout in less than a minute. If you don't like their grid implementation use one of a dozen others. I'm guessing you used pre 3.0 twitter bootstrap. The latest bootstrap (I don't know how good it is, I have mainly used Zurb Foundation) is supposed to be much better at supporting progressive grids.
