Yes, he is still suffering from Lana.
It's interesting that everyone thought this line refers to Lana. Clark's been in foster care since he was 10. He froze fish tanks, and set furnature on fire, he damaged stuff with his strength before he was able to get control of these abilities. Most everyone he knew while he was in foster homes, from foster parents, to teachers, to counselors have given him a disappointed expression at least once. He'd give a good first impression, because at heart he was really a good kid, but then something would happen and there would be the look.
