Interesting twist that she recognizes Clark instead of Superman. It might have been part of the challenge, I don't remeber much of it. Should go back to the thread, maybe.
The actual challenge was for Lois to be with Superman - but I felt a more interesting twist was for Lois to be with Clark with Clark doing his best to keep things together.
Besides why would she recognize an injured Superman without his tights if she doesn't recognise him healthy in flannel or glasses? Clark she's already seen hurt and bleeding.