I don't get the 'extended edition' idea. It's too soon to be watched by anyone who watched the 'normal' show a day or two before!
And if you're a fan, would you skip the first showing and wait for the extended one?
If you buy a DVD/Bluray with an extended version, chances are it's some time after watching the original film (or you didn't see it first time around), or you can perhaps watch the extras separately - on their own.
Either take the plunge and make the show 40 minutes in the first place, or just forget it. Does anyone agree? I certainly found it hard to watch the longer HIGNFY (bar the ones where I'd been to the recording) and couldn't skip the first showing as its a topical show!