Well, secret identities do matter, just read Meltzer's & Morales "Identity Crisis" to refresh your memory about that.
In this particular case, however, I could live with it. It also reminded me of something I had read online years before, which I dug up again now: Jerry Siegel wanted Lois Lane to learn Superman's secret identity all the way back in 1940!
I wouldn't want Lois knowing Clark's secret from the get-go to be used that much in the future, though. For this one interpretation, I'm okay with it, but that's it. Have her learn later on.