Because every other patch (since arenas began) has been exactly one week after arena season ends.

Because arena seasons always end one week before the next season begins. The next season starts when 4.3 drops. Bashiok's info is still telling us the release date because we know the fact I stated above.

Season 10 ends 11/29.

Season 11 will begin either the following week, or the week after that. PvP awards will be given out in that interim week(s).

Patch 4.3 will be released along with season 11, so Patch 4.3 will drop in early December.

Depends on how "indirect" he was being. But I personally agree that we're more likely to see it next Tuesday.

I got the same response last time. See comments here:
http://wow.joystiq.com/2011/11/10/pvp-season-10-ends-nov-29-patch-4-3-in-december/

I'll repost my response in case it's difficult to find:
Season 9 ended June 28th, and 4.2 came out on the 29th.

source on season end: http://us.battle.net/wow/en/forum/topic/2592648951
source on 4.2 patch day: http://us.battle.net/wow/en/blog/2723732

It's happened before.

The confusion is that the new PvP season starts a week later, and it seems people are remembering that

"Because every other patch (since arenas began) has been exactly one week after arena season ends."

Well, to be fair, the most recent one did not follow this pattern if WoWpedia is correct:

Arena Season 9 ended 6/28 according to http://www.wowpedia.org/Arena_PvP_system

Patch 4.2 dropped 6/28 according to http://www.wowpedia.org/Patch_4.2.0

Starlin's got it right. The last two major patches have been ON the day the season ended (or one day after), as were several patches in Wrath. Blizzard has done it one week later too, though, so it's a 50/50 chance as to whether it will be the 29th or the 6th.

Edit: Why is he being downvoted? MMO-Champ has said it'll be the 29th too, and their track record on patches is VERY good.

Starlin was stating it like a fact. Two previous patches don't make up a new rule. A cautious assumption of "one, maybe two weeks after" is more valid.

Also, as far as I'm aware of arena seasons ending, their dates are determined about a month before, so that people can plan accordingly. For patches, on the other hand, even Blizzard themselves have only a rough estimated drop date, which may be pushed back further even just before that date. The closest official announcement of a patch release date we ever got was a login status the sunday before. So, while their internal guesstimation was pretty good the last two times, and we may see 4.3 show up on Nov 29, it is nowhere near guaranteeed.

@Dan I think he screwed up in a patch this expansion, I can't recall if it was firelands or 4.1, but Boubille missed a date, I remember he even posted a garfield comic strip and said "ok you can all hate me and point my error" or something similar. :P

Following the logic that the patch drops one week after the arena season ends, that makes Bashiok's tweet an indirect announcment either way. It does not guarantee that the patch will come on Nov 29.

It's certainly possible given the most recent patching history, but not guaranteed.

I admit I hope it's the following week. Actually, I'd prefer another 2-3 weeks wait. Crazy am I? Probably, but I want to finish our guild's Dragonwrath before Dragon Soul hits, not after! GAH.