There is a difference in when a PTR hits and when the patch will go live. I'd still bet the patch will be on the PTR for over one month, good chance at closer to two since that was the length of what is thought to be a patch with much less content, 4.1.

I don't think anyone thought the PTR was going to hit two months after 4.1. And if they did, they were ridiculous.

Keep in mind its still an early PTR. Also I would rather have smaller, more numerous patches then mega patches that come out every 6 months.

I think it's mostly because this is content originally intended for 4.1. They held off on the raid content because people weren't as far through the current content as they would have liked, but now it's been a couple months and I'm sure they figure in a couple more we'll be plenty through so they want to start working out bugs now and get the patch ready. I actually like the whole smaller content patches more often as opposed to massive single patches over a long time, it makes it so that there is always something new.

4.1 might not have had a lot of content but it was loaded full of mechanics and Looking For Guild features. The simple fact that 4.2 is up on the PTR this quick shows you that it's in a more advanced stage than 4.1 was when it got up. I predict 4.2 will go live in 5 weeks. Of course if they follow suit of the last couple patches they will release it one week into midsummer festival :p