First this: facepalm
And When did Thor become significantly weaker than Superman. I keep reading that on these boards now. Where did this come from?
At most Supes has the decisive edge in strength. But it's nothing close to double, triple his strength. You guys are all losing it here.
As for Supes speed advantage it's countered with Thor's versatility and with the reflexes and speed perception he does have.
As for the crossover, saying Supes wins due to speed is fine, except that was never shown to even be an issue in that comic!
I wouldn't have minded Supes barely taking the victory due to his speed, but the way it was done was not believable in the least.