Does it really matter whether or not TSM gives the benefits of speed when it's sensing abilities more than makes up for it?
Raikage was noted to have speed compareble to the Ay. Whether or not he was going at his full speed or is equally fast/faster than ay is speculation.
Naruto in TSM allowed him to sense and react fast enough to curve the speed difference if there was one.
Plus, KCM and BM alone is fast enough. Combined with TSM then it's speed and sensing.
[video=youtube;P3pha0yvAqo]http://www.youtube.com/watch?v=P3pha0yvAqo[/video]
That leads me to theorize that Naruto can actually stop limiting his speed in KCM and BM if he uses TSM in conjunction with the two forms.
The sensing would allow him to react and sense where he's going.