What do these forums look like when using the iPad? Are the ads just as intrusive? I guess without flash, quite a few of them will not show up?

Never had a problem on here using the iPad. Looks great - same as the desktop version.

DS looks fine on the iPad. Some ads do show up but basic non-Flash ones which aren't very distracting.

I use Mercury web browser with it's own adblock and it works and looks exactly like my pc browser on my iPad 2.