Gurrshael, now that I think about it... it's possible that the value of certain trinket procs are not being reduced properly when a player is near certain caps for stats. Its value really needs to be reduced prior to averaging it out. I'll take a look at that.
When I said that some trinkets aren't averaged, I was referring mainly to trinkets that do direct attacks like
[Tiny Abomination in a Jar]. For those, we estimate about how often/how hard they hit to come up with a DPS value.
dedmonwakeen, one way that we reduce the number of data points is by only calculating estimates using one "standard" set of talents per spec. Classes like feral, moonkin, elemental, enhancement are easy: there is only one spec that really makes sense. For death knights, we have a separate set of data for blood 2H, frost 2H, frost DW, unholy 2H, and unholy DW.
Talents that have very simple effects, like "+3% spell hit" or "+5% crit" will be factored into the DPS estimates, but that's about it right now: for the most part it assumes a standard spec.
Most players will only have minor variations from the "standard" talent specs... and a lot of times these variations won't significantly affect the relative value of gear, so we considered it an acceptable trade-off between speed and accuracy.