Absolutely, and from many other UK and EU destinations too. Mind you, the SFO departure is a bit early (09.15) for westbound connections, but it should be possible to any of the other US destinations.
The other problem is that DUB is not particularly connection-friendly, in that one has to come out through arrivals, go upstairs, head (through the milling crowds) to the far end of the terminal and enter through a very small door, to the security area; the DAA really needs to rethink that; there used to be an airside facility, but I don't know why they removed that.