I had 1.2 Polo from the dealer for two months when I was waiting for my Mark 6 (this was six months into my wait). It was very, very basic - didn't even have air conditioning.
I specifically said that I didn't want a Golf, as I didn't want to spoil things for when I finally took delivery.
Don't get your hopes up - "suitable spec" could mean anything. VW Liverpool once gave me a canary yellow Fox as a courtesy car. And another Fox with an out-of-date tax disc.