From the link -
First human to break the sound barrier unaided by a vehicle. Kittinger reached 614mph (988km/h) - about Mach 0.9 - on his descent. Baumgartner is expected to achieve a speed in excess of 690mph (1,110km/h) within about 40 seconds of leaving his capsule. With so little atmosphere at 102,800ft, he will drop very rapidly
So we shall see I wish him the very best