> There's been a general consensus about what a "market" employee agreement contains, which lets people make decisions in a relatively uniform way between offers.

Is there? What counts as general consensus?

That's meant to be a serious comment. I've seen contracts that have vested stock grants expire after 2 years and some where vested grants stock never expire.

it seems to me that there isn't really any such thing as a general consensus when it comes to stock options.