my take on it is that while hartley hasn't been as great as some have made out in a few games this season he's far from passed it.
In the games he's performed he has done so very well and to be fair in the games that he hasn't performed in he's still been miles from being the worst on the pitch, although I doubt he could ever be the worst player on the pitch when ifil is involved... he's simply not a passenger!
in short it seems like millertime has seen one relatively poor performance and made a snap judgement, which despite his awesome powers of perception has turned out to be wrong. which doesn't surprise me if he rated zero higher than jess...