That is unless someone can convince me otherwise that the TE in 2WD mode and traction control is rock solid in the rain without any loss of traction...
I've been driving for a couple of decades and I've NEVER needed 4WD in rain. I've got a 1985 2WD Toyota pick-up truck with over 240k miles on it, it's got nothing to weigh down that back end and a 4-speed transmission; I have never had tractions problems in the rain.
Can I make it do donuts, or slide the back end out around corners like stunt drivers in a movie chase? Sure, but that's me gunning the throttle and intentionally breaking the rear end loose; you have to drive like an idiot to make that happen. I tried doing that in my TE and the traction control kicked in and made me look stupid for bothering. And I was rolling on Duratracs.
In my opinion, 4WD makes less of a difference in the rain than good tires do. I live in Seattle now, but I've lived and driven in Arizona, Nevada, Oregon, Washington, Idaho, and my home state of California. I've driven through "El Nino" winter deluges, endless Northwest rainstorms, and desert squalls that spawned flash flood watches in three counties. I've never once needed 4WD to drive on pavement in any of those rain conditions. Tires that have good traction in wet conditions and conservative (meaning stick to posted limits in rain, extra space to slow down, and don't gun it around corners, expect slick roads for the first 15 minutes of rain while the oil washes off, etc.) driving works just fine.
My wife drives a PT Cruiser with front wheel drive, which came with Goodyear Eagles on 17" wheels. They had decent dry performance and spotty handling in the rain. After a couple years, I switched over to Goodyear's TripleTred and we took it back to Illinois in the middle of spring thunderstorms and had no traction problems anywhere along the trip. It was a night and day type of difference. Good tires can accommodate bad conditions, but not even 4WD can accommodate bad driving.
Look, as others have mentioned in your other thread, the Torsen really shines when you are driving over a mixtures of snow, ice, and bare pavement. But if all rear wheel drive vehicles were bad in the rain, our maternal government would have outlawed them by now. We've had one of the wettest summers on record up here and my TE hasn't had an issue once in 2WD.