Well, I've put on about 900 miles so far in temps ranging from 15F to 65F.
FE (mostly highway) has ranged from ~27-30 mpg.
Nitpicks:
- 5+ speed automatics (especially Toyotas) have a tough time around town. It just can't decide on a gear, and even EcoModder-style power isn't available until it kicks down 2-3 gears. It just doesn't shift on throttle lift, even at 2500-3000 RPM. Argh.
- The XM Radio only plays music on the right speakers. FM and the Aux input is fine. I'm only getting half the song! Music mixers put different riffs or instruments/vocals on the right or left channel, so it just sounds crappy.
- 2 elements in the defroster don't work.
Honestly, I really like the car aside from the minor problems. Handling is great, FE vs. power is good. Driving position and comfort has improved over the last gen.
Data (at 5th gear, TC lockup):
60 MPH = ~2100 RPM
65 MPH = ~2250 RPM
70 MPH = ~2400 RPM
75 MPH = ~2550 RPM
...so the gearing is pretty tall
The return is tomorrow afternoon, so the full FE data is forthcoming.