I disagree based upon personal experience playing in the rain as a center. Water is a natural lubricant. As a center, you try (or ask the ref handling the ball) your best to keep the ball as dry as possible despite the rain in order to get the best grip possible to snap the ball.
You can lay a towel atop that sucker and it can still get exceptionally slippery in the moments before you snap it. However, you can get a decent grip on the ball no matter how slippery it is given enough time to handle it. Receiving the ball in the rain can still be a problem though for the quarterback--who tries keeping his hands as dry as possible too--and any player getting the ball delivered to him from the quarterback. It's the reason why multiple players mishandle the ball sometimes even though the initial player doesn't.
I'm trying to remember if Ladouceur was a one-handed or two-handed snapper? I would disagree more if Ladouceur was a two-hander. You can still get a good spin on a slippery ball deepsnapping using two hands. The extra palm surface helps immensely in the ball's delivery.
Seems like I remember there being a stink over the fact that new balls or kicking balls were also used on that play. You are right though, it's a different thing to handle the ball when you are snapping it and fielding the ball when you are setting it. You can snap the ball but not get any real snap on it and it can still be a bad snap, even though it gets there. It doesn't come in the same. Sometimes, even worse, you can get a snap that has good rotation and then the ball is wet and it's really hard to get it cleanly. However, if you watch it, the snap is bad. I mean, the announcer even calls it. The snap is way right. Tony has to reach back, across his body, to pull it in and try to get it down.
Some will call all of this excuse but if you have ever done that job, you can't tell me that all of that was on Tony. You just can't. New slick balls (which is not supposed to happen BTW), wet conditions, pressure of the game, bad snap and yet, nobody blames the NFL or the LSer, they blame Tony. Never mind the fact that nobody in the NFL uses starting QBs to field snaps anymore. Tony should never have been out there to begin with IMO.
I don't think that's right but that's the way it is.