At 8/3/2005 10:20 PM +0000, you wrote:
>If anything, as engineering friends have explained to me, frames
>work harden and in theory that would make them stiffer and at the
>same time closer to a failure.
A couple of hundred years of materials testing has shown that steel has the same modulous of elasticity (Young's Modulous) no matter how hard it is. Work hardening, heat treating or annealing have no effect on stiffness.