But don't you think it is a factor nonetheless? Running an option offense involves a lot more "handling" of the ball which already increases the risk of fumbling. Make the ball perpetually slick in a driving rain storm and I think the odds of Tech fumbling more than Miami increases even more. At least that is conventional wisdom.
But I agree with you that he should still learn to hang onto the ball.
Of course it is a factor. However, it is not an excuse either, if you get my drift. Despite the conditions, he could have handled/protected the ball better and made better decisions. When you think about it, he kept the ball so much in that game that the ball really didn't get "handled" that much more than a conventional offense. If I were to apply percentages to the cause of the fumbles I would say 50% rain, 50% failure to recognize threats and protect the ball quickly enough. Don't get me wrong N.E., I know your are not giving him a free pass either. Having said all this, the Miami game raised my confidence level in MJ's future and not the opposite and I said so the day after when a lot of us were railing him. He was aggressive, physical, and moved the ball. It was very early in his tenure as a QB and such mistakes are sadly predictable. He will learn from it, work on it, and get better. Heck, just look at some of the ridiculous decisions JT made when he first got shoved off the sideline.