i am interested in your project. i have had cornish x from 3 different hatcherys, and this years that i purchased from meyers are by far a more energetic bunch. at 6 weeks, when i enter the coop they all stand up and start running around and the roos start sparring with each other. i have had a couple fly up and sit on the top of the straw bales that surround their area, and if i leave the flap door open they will go down the ramp and sit out in the sun - then go back in. the last 2 batches would pretty much just sit around at that age. I believe that they must have used more energetic type of birds in the mix for this much action at this age and weight. Also, as peeps, i was surprised at how big their legs and feet were - much bigger than in the past.
you might be onto something big!