My AW topped Westy gets buffetted no worse than my old poptop. Less I think
just based on simple experience. The top also puts a tremendous amount of
downforce on the road -- sticking you to it better.
Don't have a mileage benchmark, but my AW topped stroker WBX Syncro with 15"
wheels does seem to get slightly better mileage than my 14" wheeled stock WBX
 Syncro westy.
CD