I just dont see him working out at all at Madrid, not to say they wont go in for him. Convincing young eager players that want first team football to do double training sessions is easy enough. His training sessions are notoriously brutal, trying to enforce them on established super stars that have won everything is another thing entirely. Poch has won nothing to earn these players respect, he's not a legend of the game like Zidane, he doesnt have the pedigree and trophies of a Mourinho from a coaching perspective.
Not to mention his pretty methodical clearing out of anyone that doesnt fit his style like he did at Spurs, which you can get away with at clubs like Spurs. That will divide dressing rooms at clubs like RM, you cant just ship out 500mil worth of players because they dont fit your style/vision/philosophy, etc.