I believe based on comments here that they are reflecting current value, not initial grants. Many of these companies have performed insanely well over the last 10 years and anyone getting typical grants have done well by them. An AMZN grant from 4 years ago is worth over 5X from then, for instance. 6.5X 1 month ago for that matter but October was rough.

Being at the right company during the right 10 years is transformative and leads to early retirement.