I've been wondering the same thing?
I have big goose eggs for some of the rooms you mentioned, I have some decent SE traffic for some of them too?
I had to clean up some links to get them to validate for my .xml feeds...nothing too radical, replace & with & etc.
I'm really surprised at how 1990's most of the poker world is
From my experience, its from letting backend programmers be in charge of fronend solutions. I've yet to meet one that is proficient in both!
Time to run some test conversions I think?