Consider that season 3 is almost here and many changes are being made. One of the most relevant is a lot more AD caster items, and AD is about 15% cheaper.
This is a pretty big deal because Jayce has huge AD ratios. Ive always built him like a Riven or Pantheon, instead of using Triforce. i.e. Dorans blades, brutalizer, ionic boots, hexdrinker, giants belt>warmog, Aegis, bloodthirster,etc.
Triforce works in SR though because Jayce has enough abilities to trigger its damage proc often, and he likes the bonus speed boost, slow, and general utility. Plus the triforce is just so efficient that many many champs use it as their sole damage item, and pile on defensive items afterwards.
But now I expect Jayce to start using more AD caster items.