Agree with the general point, but Poyet and Neville are also excellent communicators who come across with drive, energy, ideas and passion.
Whereas Hyypia, decorated player that he was, is the walking equivalent of morphine.
Having heard his monotone, morose, coma-inducing post-match interviews, I am astonished that this chap somehow manages to sell himself during the course an interview, to the extent that he actually gets offered the job of managing a football club. HOW did he convince TB that he was the man for...
Its quite impressive how he consistently manages to take on a previously successful team, and turn things around so rapidly.
I think he'd get Celtic relegated.