Well neither Kendal nor Catterick is currently a premier league manager, unless God had got his own league going up there. Moyes is a current manager, and we know him, so he just might be useful as a yardstick, which is the intent of this discussion, I think.
The argument could be made that Moyes got us competing at around the European spots, funded by 87p and a bag of crisps, and now seems to be doing the sane at West Ham. Carlo has a team that cost a fortune and is doing worse than West Ham, and is only entertaining in fits and starts. (Just as an aside, I think it was a defeat to Moyes' Everton that got Carlo fired from Chelsea).
Certainly, it's early days for Carlo, and not his fault that he's saddled with iffy players that cost a load of money, but I still think that an occasional glance over at West Ham might be helpful in actually assessing Carlo's performance, rather than some people holding a fanatical belief that the sun shines out of his posterior regions and he's some sort of deity.