I think he must have relayed the tale to you incorrectly. Stock options aren't taxed until you exercise them. Been this way since 1969.

Restricted stock is taxed at vesting, unless you choose to be taxed when they're granted to you. Ditto since 1969.

RSUs are taxed at vesting/settlement as ordinary income. This was pretty much the case since 1969 as well, but fully confirmed in 2009.