It sounded like a generalisaton for directors, and yes I meant a UK or US based team when I say english speaking (I guess my collecting noun implied english-origin directors, which is not what I meant, given your examples of Bruyneel and Aldag).
I guess what I meant is that the american teams (and I think sky will do the same) have a different view of managing riders. I base this on what I have heard many riders talking about in interviews when they've gone from a traditional old school european team, to an american team, and they've said that the managers treat them in a more positive way, and they're previous managers were very "we pay you, therefore you must win" or along those lines.. not a direct quote, but this was similar to what they say.
In my mind, I think Cadel would benefit moving to this type of scene, rather than what he has at the moment at Lotto. Again, I don't have direct quote, but i've read in interview's that Poppo felt very unenthuisiastic at Silence and that the feeling around the team bus was stale and business like. Whereas at discovery it was a happy family, and everyone felt good about how the team was managed, and the riders as a result, were much more motivated which lead to greater confidence of success
In addition, teams like Saxobank also have this happy family feeling, so the main issue is that Cadel needs a change of scenery with differs from that of Silence