What print speeds can I expect from the HP PageWide Pro 477dw?

The printer can print up to 40 ppm in both black and colour at normal A4 quality, and up to 55 ppm in General Office mode for both black and colour. For duplex (two-sided) printing, speeds are up to 21 ipm for both black and colour at A4 size. First page out is as fast as 6.5 seconds for black and 7 seconds for colour from ready state. (Page 3)