I think it's a bit too premature to come to any overall conclusions about the O-line, but I do think they did a nice job against the Texans. My belief is that the O-line in general improves as the season wears on, so I wouldn't draw too many conclusions until at least after the first four games. Anderson may well start doing better in the next few weeks, who knows.
I do think, however, that a lot hinged on how well they would respond to the Texans front 7, and they did get the job done well enough.