No, not that I've noticed in particular. Just was wondering if the waterproofing products might make them a bit more durable, with the side effect of making them more waterproof than they are when they leave the store....but that's not to say that I've had problems with them leaking.
Thanks for the thoughts on the Nikwax and Seamgrip.
When I go ice climbing, I usually throw in a pair of warm gloves and/or mitts, a medium pair (the Punishers), and a light pair of Atlas grippy gloves if it turns out to be warm enough to use them (they work particularly well with the Ergos, IMHO).