My theory (and I admit I haven't heard anyone else say this so I'm probably wrong) is that wind favors Flacco more than Brady.
My reasoning is that Brady runs a precision passing game, and wind has been known to cause problems with that. On the other hand, Flacco is known for his arm (so he could possibly power the ball through the wind better), but more importantly Flacco's long game consists mainly of flinging the ball up there and letting his receivers go for it. I think his receivers may well be able to adjust to the windblown balls better than we think.
brady...short passer...flacco...deep high arching passer.....wind will hurt flacco..not brady