Just done a 50 minutes/30 mile trip home, half in the city (ie stop-start) and then half on fairly twisty A-roads. Didn't notice anything wrong, although I wasn't paying particular attention. Stopped for a subway 5 miles from home, and noticed afterward that the car was sounding a little agricultural. She seems to pull fine, but the sound is just a little more dieselly than I've been used to.
Temps were fine, but when I stopped and went to the boot I smelled a very faint burning smell - this could be unrelated, as a lot of people near me have coal/wood burning fires. The fan was also running, which seemed strange as it's about 1.5 degrees here and the journey, while not cruising, was hardly strenuous. I doubt I hit 4k rpm all the way home, and the last 5 miles involved two 0-40s and mostly 6th gear at 1200rpm.
She's 10 months/13k miles old, so it may just be that she's lost that new car perfection... am I being paranoid, or is it worth getting her checked out?