Noticed an interesting bit this weekend. I ran SoO #1 on my boosted warlock on Saturday afternoon. My boosted toon was in mostly timeless isle pieces with a couple of the 483's remaining (including staff), but fully enchanted/reforged except jade spirit. My DPS wasn't great, but it wasn't horrible either -- bosses were around 75-80k or so.
In that run, I got a cloak upgrade from a celestial turmoil, shoulders from Norushen, and luckily the staff from Sha. I upgraded the staff to 2/2, and enchanted everything. Ran SoO #2 on Sunday, those three upgrades were enough to bump me up to ~110k on 3/4 bosses. On Kor'kron Shaman, I finished at a hair under 130k (havoc feels like cheating sometimes...). Talk about the power of mastery! Can't wait to get some more pieces to see what I can get out of a somewhat-decently geared character. My other lock is ilvl 524 and roughly the same dps, but has some poor itemization on the SoO pieces so is actually at about the same % mastery.
Also, swapped my warrior from fury (483 MH / 463 OH) to arms (463 2H) and saw close to a 15k dps increase...without knowing how to actually play arms. I didn't realize fury was so bad comparatively, going to have to learn the new rotation. Solo'd BT and Hyjal on this toon, got full Onslaught and Cataclysm's Edge, looks quite awesome on a worgen. Still need the matching boots from BT, hoping to get lucky with the shield too but probably won't run weekly until it drops.
honestly, at this point I don't even want to run my mains through LFR. I've heard way too many horror stories about the state of things with all the fresh new 90's who don't know how to play their characters.
As reference, my 75-80k in SoO #1 was top-5 for that group. For SoO #2 I got joined on the 3rd boss first time, I was #2 on shaman at ~130k, #3 on Nazgrim at 115k. We beat the enrage by literally less than 5 seconds. However, when I requeued for the first two bosses, 110k was like #10 or something ... so it's hit or miss. For right now I'd say avoid ToT ... you can probably stay ahead of the boosters in SoO for another week or two.