0.935 Mach and 51K feet. Not too shabby.
Yup, and has been for quite some time.
Which caused many problems in my former job (retired), ATC. I also owned an aircraft marketing company, so I prided myself on knowing aircraft capabilities, but most controllers did not. Lots of 'deals' resulted from running a C750 up the butt of air carriers....Citations were the ones usually getting run over.