Gotta be a bad wheel build. I'm 300 lbs and bought new Sequoia, stock crappy AT400 rims with 28 spokes on the front (23mm tire too). The LBS employees even said those were crappy wheels for my size.

I ride some harsh highway at high speeds, and after a hundred or so miles that 28 spoke front tire's still in true, although I did order some Mavic CXP-33 with 36 spoke 14 guage 3-cross pattern from CO Cyclist site. I'm not sure I should have ordered those wheels given the reliability of my stock wheels.