Haha, imagine the cheek. Could understand it if they did but like I said a mate of mine did say he'd had it done and even went on to say how much better/quicker it was. He's a good liar if that's the case, he had me only one way to find out I suppose. Give them a ring
The difference in a good map is noticed pretty instantly, If a customer doesn't like what they have I won't charge them and put it back to std. TFSI's have plenty of niggles, so it's worth going somewhere that will health check it too. I've just done a late B8 A4 that needed a DV and coil.