Holy shades of thread resurrection, Batman! I salute you sir for looking through the threads to find this one!
The heat management system wasn't changed for the 09 models. That only started with the 10+ models. Some 08/09s were hot as hell and some were not. Could be that the heat management (what little there was..open to some debate amongst the knowledgeable) was out of place on the 08 and the factory did a little better on the 09 but there wasn't anything changed per se.
I do know that windshield position has a great affect on ankle heat, believe it or not. A shield all the way down restricts air flow over the front sides while up a bit (at least an inch or so) does not. Counter intuitive, I know, but it works as I can tell the difference in the air flow.