Below are a few of the discounts on the "leaked" ad:
iMac: $101 off
MacBook Pro: $51-$101 off
iPod nano: $11 off
iPod touch: $21-$41 off
Boy Genius Report notes that these deals apply only on the online store, not at Apple's retail stores.
Though this ad seems legitimate on the face of it, it's worth noting that pretty much everyone here at TUAW agreed Boy Genius Report's last "leaked" ad was a fake. So take this latest "leak" with a grain of salt. However, after taking into account Apple's Black Friday deals in earlier years, whatever discounts it offers this year are at least likely to be similar to this latest ad leak whether it's the real deal or not.
[Via Mac Rumors]