Only anecdotal evidence, but there seems to be an increase in the number of quality MkVs on the trader for sale, ie nicely specced ones at sensible money (under 13k) that I would buy.
I guess the emergence of the MkVI is having an effect on the market. There must be a lag effect from announcement, launch, mag reviews, denial (from older model owners) before used car prices for the mk5 is affected.
I'm still v happy to be on the order list for a mk6 but saving over 10k is nagging me!