PRearden,
The Good: So glad you enjoyed this! Thanks!
The Bad: It is actually a 1/2 bar intro. So it's twice as abrupt as you thought, and I like it.
The Ugly: I could have made the intro 3 bars, but that would made the guitar get tedious about 17 seconds earlier, but your point is noted.

The Beast: Why, thank you!
HaHa! I never noticed the "Chicago Connection" before! You young whippersnapper! I was a junior in high school when 25 or 6 to 4 came out. Great song, great band! I was listening to an Aimee Mann song a couple of years ago, and it occurred to me that if you take some of the rhythm section out of the mix, the melody is basically "Happy Birthday To You"!
Thanks for listening and posting!
Steve