Does this apply to the new (post-2003) F-150s, too?
Not sure. I haven't sat in the new 150. The 250/350, however, have this problem, as did a friend's previous-interation 150, as did the taurus I had for a while, as did a fox-platform Mustang I sat in, as did my folks' Explorer. I have to think that this is part of their standard geometry for the interior. It basically translates to about 4-5" of my thigh just above the knee not being supported, and I am 5' 10" with average-length legs. GMs in general, and the Dodge 1500 I test-drove, all had much better support under my leg. I also like the way GM and (recent) Dodge lay out their gauges/switchgear better.