Yeah, that jives with what I was told. I think the stock grants mature over 4 years? I think the schedule was kind of interesting as well but I don't remember what it was, it wasn't 25/25/25/25 either.
To be honest, I think it was a miss-match in positional terminology. I was going for a PM role, which in my current career path is basically the CEO of a specific project or program for part of a company. (These programs can be very big, the largest program I ever worked on as part of the PM staff was north of $130m/yr. but for a wide variety of reasons I prefer the smaller $5-20m work, much more fun to run). Typical compensation is a base salary + specific performance bonuses + contract win bonuses (+ large option grants as bonuses in the kinds of companies that do that sort of thing).
I got the sense that at Amazon PM roles are much lower down the totem pole positionally and act more like coordinators in the organization and don't have as much agency as I was assuming. I was honestly just looking for a change of pace and probably would have accepted whatever they offered even if it was quite a bit lower than what I considered my market rate, but I fouled it up early on and didn't recover well.