That is a very good point, that is a possibility. E3 2010 was funny because they unveiled the Xbox 360S model and then gave everyone in attendance one. I listened to an old Games Radar's podcast Talk Radar and one of the hosts, Bret Elston, had just gone out and bought the Xbox 360 with the Final Fantasy hard drive and wasn't in attendance. That's possible, maybe a reason for the deals going on now, but I highly doubt it as the S model came out a long time after the other 360 models were out. You can look at the graph below for when Microsoft launched each console.