Indeed

Which is why I had that 'don't use AW' in my post.
@gmedina:
You can use a trinketswap before the pull. But that's still a border case simply because it happens to fall within the ICD time of the trinket.
It won't help you in the last few % burn phase, or assuring you can make the most out of a heroism. There is a very definate advantage to 'on use' trinkets over random proc trinkets. The extra proc damge you get out of the random proc trinket would need to be 'substantial' to offer a real benefit to total DPS done because you can't always count on procs to happen when they matter most (again Murphy's Law will cause it to ALWAYS proc 1 second before you need to run out of some kind of fire or the boss vanishes for a while wasting the entire ICD on it

). And while you can wait for your random proc trinket to happen, it means delaying AW, which could mean you end up with one less AW over the course of the fight, which will also be a net DPS loss.
I'm not saying all random proc trinkets are bad. Just be aware that a on use trinket (especially the 2Min CD ones) are typically much better than what rawr puts them at.