I've not seen any dealer demo's about, unusually, but I did see a white 5 door in Exeter in early March so therefore it would have been one of the first registered.
I've not seen one since.
In all honesty I'd expect to see more of them than GTI's over the next couple of years going from the forum and road test opinions on cost (ignoring the list price and going more on the fact most buyers pay monthly and therefore there might not be that much £££ difference per month).