I drove it with the scanner running and watched it the rail pressure. When I accelerate slightly harder than grandma mode, I get what I would describe as a miss. Doesn't do it every time, but it's reasonably predictable. While testing, I could see no correlation between the fuel pressure on the rail and the miss. That could be because the scanner isn't sampling often enough, or it could be that it's not the issue.

Maybe it's not the fuel pumps at all? With readings into the 12's MPa when it's running, that's over 1700 psi, which I would guess is correct?