Yes, that is what you're saying, but when you're mentioning the possibility of it being this week you're building peoples hopes up that there will be a beta 2 this week (I know it shouldn't, but there are far too many naive people who believe anything they read). By posting that it could be this week, all you're going to get on Friday night is "but you said it'd be out this week" "this guy said it would be out this week" "Apple are crazy, why didn't they release it this week like they said they would".
All I'm trying to do is mention that in the past additional betas are generally 2 weeks or more. Yes, there may be circumstances which mean that a beta has to be replaced sooner rather than later, but two weeks gives them more time to iron out bugs and implement features.
Remember of course that they haven't actually put an iPad build out there yet - developers would be in a backlash "Apple have found the time to do two betas for iPhone but nothing for iPad" etc.
See above for my reasoning. Telling people that the beta 2 could be out this week is just going to generate lots of posts on Friday night asking "Why haven't Apple released beta 2 yet?". Its usually exceptional circumstances which mean that betas are replaced quickly, but at least give Apple time to release a build for iPad (which, presumably will come along with beta 2 for iPhone).