Originally Posted by cooltyler
it is not available for the rate you chose"
That makes me believe all the more that the FHR and other Amex "special" rates are just another way of paying for the upgrade -- it isn't free. You just pay more than the low rate you would otherwise get by not calling AMex.
On occasion, Amex gets be a better rate with an upgrade than I can get myself but it's so infrequent that I've basically given up wasting my time calling them about it.