On the tfsi the fuel pump normally primes when you open the front doors, and then again when you go to ignition.
I have been experiencing a few irritating faults for a while now that only seem to revolve around the starting procedure , not running.
On random occasions, and it is very random the car takes longer to start then when it does I get an EPC fault and poor running until I restart a few times to clear the fault, car runs very well when starting normally.
From memory the problem did initially start out as poor starting on occasion such as you two chap have noted but then led to EPC fault and then a MIL lamp.
I've done all the vcds diags ,replaced everything parts that were flagged as possible failure points etc but still get it .
I went a month fault free and then bang it was back three days in a row.