Well, it certainly seems like it.
I bought the last three issues of the Busiek/Pacheco Superman over the weekend, as well as Action Comics #850 (thanks, Matt).
Yesterday, I picked up a copy of The Sinestro Corps., and almost threw a fit when my store didn't have the follow up issue, Green Lantern #21.
In addition to the books above, I never stopped buying Batman and All Star Superman, so, if indeed, I pick up the next issues of all these (yeah, I know Action 851 & 852 are out) I'll pretty much be back on the DC train. Not like I was before, but I think it'll be enough.
Oh, well... I can always quit again when Final Crisis sucks.