Yeah, I think you'll get better results if the water you pitch into is a little warmer, like 90F. As long as it's under 105 or so, you won't damage the cells. I like to swirl the vessel around after I pitch the packet, just to make sure the little pellets are sufficiently hydrated.
Rehydrating protects the cells from shock as they're pitched into the sweet wort. It will increase your viable cell count a great deal.