I had my first experience of Festool UK's repair service recently (I had an issue with the electronic brake not working on my OF1400), and I have to say I was more than happy with it. Rang them Monday morning & spoke to Amy, she asked me to fill in the repair form (from the UK website) and fax or e-mail it to them. I did that, and within 10 minutes I had an e-mail saying it would be collected that afternoon.
It presumably reached them on the Tuesday, then they turned it round in 48 hours and despatched it back Thursday, and it arrived Friday. The 48 hours obviously doesn't include collection & shipping (if it did they would have no time to repair it!).
I could have driven the 30 mins or so to my dealer & got him to send it back, but I didn't see any advantage to that. If I'd needed the router, I'd have taken it to him then and got a loan machine, but since I didn't need it I didn't bother.
My only criticism of the whole process from my point of view is that I would have liked to have got an e-mail from them on the Thursday saying "we've repaired it & sent it back and it will be with you tomorrow". But other than that, no problems.
Joiner, if yours has been over a week I would give them a ring tomorrow. All the contact names & direct numbers/e-mails are on the UK website.
Also, it may be worth checking when your dealer *actually* sent it - they could have delayed it for a day or two.
Oh, and as an aside - I asked about transferring warranties, something which several people have said they're unsure about in the UK. Graham from Festool confirmed that UK warranties are indeed transferrable - if you're thinking of buying second-hand, you can send them the serial number & they will confirm how long is left on the warranty for you (and presumably check it's not registered as stolen!).