Are you referring to the discussion Gates and Ballmer had about diluting Allen? That seems to be a way to dilute a founder who was slacking off. The word partnership is used several times; this may imply that everybody was 100% vested already. If so, this is the only thing they could do to somebody who wasn't pulling his weight.
I've met Bill Gates, so I'll stick with my personal opinion. You're entitled to yours.
Where have you supported that claim? If you've "met" BG, I invite you to post some already-known anecdotes etc about his conduct as a friend, which is exactly what I asked about.
Gates and Allen were friends at when they went to school together. I went to the same school some years after them, and drew my own opinions based on first and second hand experiences with both of them.
No matter what you believe about the quality of their friendship, there's a teaching lesson for co-founders in their story.
Ownership shares are not like salary (imho): they're not just for past work, but also for future contributions.
Without specifics on to what extent exactly they were planning to dilute him, I am not prepared to condemn BillG. YMMV.
Jobs' actual cheating through a straightforward lie to Woz wrt how much they got paid for Atari's contract job they did is FAR worse than a planning conversation BillG had. IMHO. http://www.rotten.com/library/bio/hackers/steve-wozniak/