I've completed a full tank of driving on the new Continental TrueContacts. Here are my updated observations from driving on dry and wet pavement.
The Contis are no noisier than the Toyo A23 OE tires, but the noise is a little difference. I note more road "hiss" from the A23s but more low rumbling from the Contis. Overall neither tire was obtrusive.
For handling, the Contis are the clear winner for feel, though I can't objectively test cornering traction or ultimate stopping power. They make the CX5 feel more lively and light than the A23s, which by comparison feel like they're on novocaine. Steering is lighter with the Contis while also being a little more precise. I feel as though there was more tread squirm with the A23s. Both tires have good wet and dry traction and good resistance to aquaplaning. The Contis communicate more information about the road surface - some might say they are less comfortable, but I prefer this to the novocaine-like isolation I felt with the A23s.
These are subjective evaluations. I'm a "sensitive" driver - I can hear and feel a fault in a vehicle long before friends and relatives can. But my wife is the opposite - she could be driving with one flat tire and probably wouldn't notice. She has complained that the CX5 feels "heavy" compared to our 2010 Mazda 3 GT. But since the Contis were mounted on the CX5, she says it feels more "Zoom-Zoom, like the Mazda 3". I find it much more pleasurable to drive with the Contis, and that is worth the cost of the tires.
I will need to run through several fillups to compare the effect on fuel consumption, and cold weather performance will have to wait for 2 to 3 months.