The problem is you wasted your money and bought a Lexus instead of a Subaru. If you wanted a car that goes in the snow, you made the wrong choice. All AWD is not created equal...you found that out the hard way.
Wife has an 07 IS250. I have an 07 Subaru Legacy 2.5i Ltd. Her car is like 10K more than mine. Guess which one gets around in the snow better...WAY better. No, I dont have the Lexus image, luxury, etc. But when it snows....it goes. Subaru has the AWD down and has been doing AWD longer and better. 50/50, symmetrical AWD. It works incredibly better than the Lexus....
Now I'll wait for the Lexus crowd to pile on....whatever....I'll seem them stuck in the snow as I drive by...I'll stop and help if I'm able.
My wifes 2002 outback LL Bean goes in the snow, and I dont mean kind of, the only thing that stops it is getting high centered, so if that was the only reason to buy I would agree with you. However, everything else in my 350 is nicer and in some cases WAY nicer, as with everything it just depends on what you are looking for. Our Subaru is a wonderful do everyging family car, My 350 well, not so much on the family car, but boy is it fun to drive :)