Following your 'logic', the 40D also had this magically improved AF code. The 40D does not have MFA, yet it was introduced after Canon had released a camera with MFA.
See the logic in my posting.
If there were any I would.
The 40D isn't a rebel. It was introduced after Canon had developed MFA. These are the two conditions which, according to you, mean that the 60D must have a new, improved AF system. So, according to your 'logic' the same must apply to the 40D.