It's fairly obvious the only thing holding up D3 is SWTOR. They are clearly going to launch it to compete with SWTOR. Do you honestly think a game like D3 takes as long as a Triple A MMO like SWTOR to develop? Well D3 has been in development just as long. I say development loosely. There have been tons of rumors that D3's development has purposely slowed down, and the game has been virtually complete for almost a year. That they are delaying the game for the launch of SWTOR, and so possible console ports can close the gap between the PC release date.
The market for SWTOR and D3, is not the same market as BF3 and COD. Regardless of all the amazing titles coming out this holiday. Anyone who is going to skip picking up an MMO at launch for COD or ME, were not the audience that flocks to MMO's and makes them sell millions of copies in the first week anyway.
That said, I don't see SWTOR coming out before November. At least at the current rate. it's fairly clear from the cake site(so no surprises) that 0 end-game has been tested. To put it in perspective, Blizzard has their internal QA team test all raids prior to them going up on the PTR for a couple months. Then they are on PTR for almost two months.
SWTOR doesn't just need to test operations, they need to test EVERYTHING end-game. From the CM post earlier in this thread, the beta goes down on the 20th and in the "coming weeks" will go up with a new build.
So lets say It comes up August 7th. Which I think it s generous date. Two months of testing means you are already into October. It would take most people in beta that long to get enough level 50's just to test end-game content. Then you have to actually test all the end-game features Bioware has put into the new beta built.
So lets give Bioware the benefit of the doubt, and say they are going to give everyone 1 level 50 toon. Still allow them to level others, but give them a max level toon to test the high-end content. So that gives the beta community two months or two and a half months to hammer out every little bug end-game SWTOR has to offer. This is a task, remember, that takes the most dedicated hard-core players in WoW, two months to do for a single raid. Let alone multiple systems, operations and features.
It then takes another month for the game to go gold and the advertising campaign to kick off.
There is no possible way this game comes out bug free before November.