It's really not rocket science (even though they try to make it sound such). I'm sure mathmatically they can prove this and that, but it really is all just common sense.
Each park has several landmark attractions. For example, at MK it's Splash/Big Thunder and Space Mountain (and now Pirates too). At MGM it's the ToT and the RnR. At AK it's Everest and the Safari.
These are the big ticket attractions, you want to hit them EARLY or LATE. Get to the earliest showings of theme park shows you can - they (generally) get more crowded in later in the day as people go "oh darn, we haven't done that yet". For nighttime shows (Fantasmic! and Spectro, mostly) the 2nd show is ALWAYS much much less crowded than the first (which is a great time to experience attractions while everyone else is at the first showing).
Really, the best bit of advice those tour plans give is what any good Disney fan will tell you : GET THERE EARLY. EARLY! EARLY! I mean it...EARLY. I know it's your vacation and all, but getting to the gates of a park at 8:30, versus 9:30 or worse 10 or 11:30, is like night and day. NIGHT AND DAY. If you are walking in a park as it is opening, you can see half of the attractions before lunch if you keep going and keep head of the crowds building behind you.
Nothing against touring plans, just think they are unnessesary in a lot of respects. If you are going to show up on 4th of July or something I'm sure there is some mathmatical advantage, but you'd never catch me dead at the parks when they are busy enough to really matter. I'm just so spoiled at this point in off-season, early AM touring - you can see most rides with a less than 5 minute wait if you do it properly, so I can't imagine ever waiting more than 10-15 for a ride. On the days when you need a "step 32, empty bladder" touring plan, you still will be waiting in lines and crowds that I just wouldn't ever want to deal with at WDW.
AEfx