RobJar and SwedeChris, I hope that this helps
My understanding is that a polarized frame has extra weight at the butt cap and at 12 o'clock and a de-polarized frame has weight at 3 and 9 o'clock. Both are useful depending upon playing style and the types of results you want. The SW2 threads are very helpful on this.
THE HEAVY RACQUET PLAYER'S CLUB
1. HarryZ: Head MGPM 93 sq in (89.5) stock 12.2oz, SW 328, polarized, >365g
2. HydroYang: Yonex RQiS 1 Tour 345g
3. VGP: Wilson PS85 Taiwan - 13.5 oz, 8pts headlight, Wilson PS85 China - 13.1 oz, 6pts headlight, Dunlop HM200g - 13.7 oz, 10pts headlight, Dunlop McEnroe Master II - 13.9 oz, 10pts headlight
4. Tofi: Wilson K90, 12.5oz, 354g, SW 336 (Add some lead!)