My car was delivered on 26th July 2009, just two months from order.
August 2010 and my LED rears were fitted along with my other retro fit, there were and have been no bulb out warnings since then, so if my car is ok then yours should be fine too.
Hope that helps, the LED rears look really great, not like those nasty Audi esque things they are putting in the front of the Golfs these days

Gizzy