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@BringMeMyFix
This sort of covers it: http://www.slowtwitch.com/mainheadings/techctr/wheels_tires.html
Quite boring though, isn't it.
I experimented with lower pressures on hillclimbs one year. Running 80psi in both front and rear (23s). It definitely helped reduce wheelspin on wet/leafy/greasy surfaces, but I think it was scrubbing my speed due to my extra weight (whilst standing) over the front wheel - just felt too squirmy, and cost me 5 to 10 seconds over 2mins.
I think wet/slippery hillcimbs are the only occassion I'd consider running more pressure in the front tyre than the rear. Oh, and I'd always be on 23s of course, due to acceleration and weight :)