Hi Peeling - I have seen you on another multiples thread - many congratulations!
I think I made this point on that thread...so sorry, at the risk of repeating myself...I have the opposite "problem" ie that no-one has made a fuss of me because I am expecting DCDA twins. I haven't seen a consultant yet in my pregnancy, only the MW. My pregnancy has been treated as normal/low risk save for the additional growth scans at 26/32/36 weeks. So, I think it definitely depends on area/hospital policy. I'm in central London.
Now, I have no idea as to what will actually happen on the - rapidly approaching - day, but my plan A is a VB, and I have the understanding that if anything goes wrong/changes, I will need to be transferred to theatre for C/S. Certainly there has been no mention that I will start out in theatre (I was also told by the MW that I could labour in water if all was ok) so no, theatre as Plan A is not "standard".
Personally I would have preferred a slightly more medicalised approach to my pregnancy, but, like you, I wouldn't have taken kindly to being told what would happen! I went to a very useful TAMBA evening session early-ish in my pregnancy, where the speaker talked about birth options etc. Perhaps something like this (and some additional research) will give you further confidence to query the consultant's protocol?
In the meantime, take good care of yourself in terms of eating, drinking, rest - and you will hopefully maximise your chances of remaining "Low risk for twins"..and therefore more likely to have the birth you want. Kitty