Not Mach 10 specifically, just a pretty low double-digit speed.
Shikai Ichigo was calced as a bit under Mach 5 with the captains being at or below his Bankai speed. Yamamoto is much faster then these captains and FTG Ichigo and monster Aizen are somewhere above him.
I'd take a guess that captains are around Ma10 with the fastest three being at most Ma20. Sorry I can't be more specific but so far there aren't any known calcs for characters past this Shikai calc.
Oh, right. This and this. (from Xemnas)
Dunno about Ichigo taking strength. His hill/mountain busting feat(from zenieth) is/seems/looks smaller then this feat from Zarbon(from ChaosTheory123). And base Goku when arriving on Namek had a PL triple that of Zarbon.
I guess it was a filler with Krillin statement but this kick is above what you showed me.
http://www.mangareader.net/105-2958-14/dragon-ball/chapter-309.html