I don't know for sure, but I think this is just mild flooding, and quite normal. It used to happen to my Mk4, if you fluffed up the first start e.g. the key slips out your fingers, it then needed a several second hold on the key to get it to fire. Oddly my mk2 16v isn't like that though, although the missus focus is.
If your still not happy... Spark plugs are critical to good starting, so I would have a look at those first (esp as they are sooo cheap)!
Dave