Does Time alignment and Phase coherency make for a better loudspeaker?

A simple experiment can be conducted to testify if the time alignment affects anything audible. Take a pair of speakers that you think have a good image, tilt the front panel back and take a serious listening again to see if the imaging gets thrown off. Conduct the blind test with the help from the 2nd person if necessary to eliminate any gussing game or mental effect. To me, I need to admit I could not hear any difference. However, at the same toeing angle, tilting them back does change the soundstage slightly.

Every speaker manufacturer needs a hook, a set of claims to sell speakers. Nothing new. 

Dutch and Dutch 8c are coaxial,  their measurements speak for themselves one of the best on axis and off. Linear phase,  constant directivity from 100hz >. 

Maybe we can get this thread removed too if we get him excited?