It seems my assumption that Tyrese Gibson might be wrapped on Transformers 3 and moved onto Fast and Furious 5 was incorrect. Based on last few days of tweets he is in fact now commuting between the two sets, the TF3 set in Detroit and the FF5 in Atlanta.
Late Monday night he tweeted "Back in Detroit.. More robots to chase in the AM.. #TF3". Minutes later this was followed up with "Wearing heavy gear while I save the world from these evil Decepticons!!" along with link to a picture of Josh Duhamel and him.
Finally Tuesday night he tweeted, "Just finished another day of shooting Transformers 3.. Headed BACK to the AtL tomorrow to get more action on Fast & Furious 5." I assume that means he was at the Packard Plant filming whatever all the smoke was for. Thanks to Charlotte for info.