Warming up slower?

It feels like our 2007 is warming up slower, often taking an extra 5 minutes or so before the MPG bars show best efficiency. Which is unexpected because it has been quite warm lately, often near 90F, and naively one would expect that to result in faster ICE warm ups. So maybe not an ICE warm up issue.

I may be hallucinating about this, and it could represent something environmental, like changes in driving patterns. There has been a lot of stop and go with the A/C on, for instance. But for the sake of argument, if there was a problem, what should I look for in Techstream? Coolant temperature, pack temperature, something VVT related? No CEL is lit.

Thinking about the pack temperature as a possibility because the car is parked in the sun, and it might take a long time for the A/C and pack fan to cool the preheated pack down to a temperature where it works better. The other day I looked at that with Torque and pack T2 was 105F at the moment the car turned on and then with A/C on it quickly went to 107-108, it had not come down much in a couple of minutes sitting in the driveway. Better cooling when moving than sitting still, of course.

Edit: just checked again with Torque and no error codes. It is earlier in the day and battery T2 at startup was 87 which is only a little more than ambient of 85. Windows in car have been open since the sun came up, last time it was early afternoon and the windows had been closed.