Most of the accounts that I read gave both a B- type response. Good, but certainly not great. Bush's aid package is no doubt necessary, but a bunch of folks have huge concerns about potential market distortion. And Brown made a few nice policy announcements (free prescriptions for Cancer patients and free nursery for every 2 year old), but generally lacked substance.
As a quick test I wordled their speeches to see if anything interesting came out:
Bush:

Brown:

That has to be the most high-brow word cloud ever created from words uttered by George W Bush! And in Brown's cloud you can see the root of the problem. Those are the words of a generic socialist leader speech. Fairness, people, every. The one thing that jumps out at me is that the most popular word he used was 'new'. Yet I watched his speech and I can say that in my opinion, that is the one thing it wasn't...