DSG slow downshift

I have had my new MkV GTI DSG for 3 weeks now and am generally happy with it except for one thing. Most times when I manually downshift from one gear to the next the shift takes about 1 sec which is much longer than the very fast upshifts. It's as if the gearbox is optimised for upshifts by preselecting the next highest gear and, when I tell it to downshift, it has to go to the shop, buy the required gear and fit it before changing down (OK, it's not that bad but 1 sec feels long when you are freewheeling into a corner and are waiting for the downshift to occur). This is most noticeable when downshifting from 4th to 3rd since I mostly drive around town in 4th. I have recorded the engine sound on my PPC and analysed the file with audio editing software and can confirm the 1 sec delay before the downshift is complete. Anybody else noticed this problem? Barry