I'm unsure, but given its a drivetrain problem and getting the map invalidates the drivetrain warranty I would assume they haven't found it.
The dealership does not have to 'go looking' for signs of a remap, the auto scan they do when looking for fault codes will always through up a TD1 code which highlights that the cars is mapped.Read this post for a detailed insight into this whole issue.http://www.golfmk7.com/forums/showthread.php?t=7492
Who is getting one....http://forums.vwvortex.com/showthread.php?7123918-Unitronic-Stage-2-Turbo-Upgrade-Kit-for-2-0-TSI%AE-Gen3-MQB%AEKen
That's a stupid price for 60bhp extra. Given how the car struggles to handle a stage 1 giving it any more power would be a waste. Would keep the traction control busy I would imagine