I also helps that it is cooler outside. My bike loves this cool weather, it has a lot more pick up and go.

Yes, definitely, however man...the last couple cool weekends I noted my baby just didn't have that same hyper snap...
Thought of the possible worn plug scenario and swapped them out. BINGO...the snap was back...but it was different...I realize this is all butt dyno stuff...but she sounds different...and BETTER...
I am like hard core with my guitar tone...and spent YEARS experimenting with different everything to get the sound I finally got. I kinda feel the same way about the sound of my bike...I listen very closely to it... I don't think it's all in my head... The NGKs did make a small difference.