From personal, bitter, weekly experience I can state absolutely that Sheffield (West at that) to Manchester Airport (car park nearest to T3) is 77 mins best case starting at 04:25Hrs in the morning, driven 'at a fast pace' over the goats track.
63 mins? Not within the speed limit.
No doubt the same 'consultants' if working on a railways project would also say Sheffield has good links to London by rail ....