The Wladimir Klitschko that destroyed ray mercer vs daniel dubois of today

Mercer was 42 years old and had mostly been inactive for 6 years only having 6 fights in that period prior to facing Wladimir with not one notable win.

So what would you call that then ? Fresh as a daisy ?

So yes it's common sense Mercer was completely past his best and the age and inactivity with a lack of notable performances/wins should be the biggest clue.