I would also have been happy with a T5, but they are selling at the same price or more than a new T6 here!
Well, my collegue ordered his T5 in December last year and only received it in May this year, so the waiting time for an ordered vehicle doesn't seem to have changed that much!
For me I had no choice and I could not wait as I got more than 15% discount by ordering now. The exchange rate is extremely low at the moment making all my Euro purchases cheaper and it looks like it's going back up!
As for teething problems, a few members have pointed out it's not a completely new vehicle and the majority of the parts are the same as the T5. So if there are teething problems, they should be very similar or the same as the T5. The only really new parts are the engines, but these are already being delivered in the T6 panel and multivans and so will have almost a year of experience by the time we get ours.
Of course I could be completely wrong because it's Monday morning and I have only had 1 cup of coffee