Something that people need to remember is that Hiryuu >Shouten Ha requires
the opponent to get *very* 
angry. How often has Ryu, not including when he was shot >and became evil,
*ever* lost his temper in a fight?
Wouldn't this make it a little unlikely that a Hiryuu >Shouten Ha would even
be possible in this matchup?
Just my $.02 ;)

	This does make the standard Hiruu Shouten Ha difficult to perform.  
Thing is Ranma's demonstrated himself to be smart enough to create powerful 
modifications of this maneuver anytime he needs them.  So while Ryu might not 
get angry enough for Ranma to apply the origional, Ranma might figure out a way 
to use one of Ryu's techniques as the focus of a NEW version of the Hiruu 
Shouten Ha.