Hi Guys,
We made our transfer with around 60 min spare time at DTW, partly due to our flight arriving 30 min early.
Security with an ESTA only took 10 min on landing at DTW, and then our bags were waiting for us, as was the shuttle to the other terminal - I don't think we could have had more perfect luck on this than we did!
My view of security and bag collection at DTW was fantastic - one of the best in USA I have experienced!