Neil sorry Daren - Racing flats are getting close to running in minamilist shoes. Too make them work you don't have to run faster, you just need to have a more bio mechanically efficient gait. You could run a 2hr HM or 4hr Mara in them, as long as your not a heavy heal striking plodder.
TM session for me today, after warm up, 6mins @8.30pace, 5 @8.00, 4 @7.30, 3 @7.00, 2 @6.30, and 1 @6.00. But no recovery, so a progressive paced sess. Felt good in minamalist shoes.