I live in the PNW where sun is a treat.. even when it isn't raining, heavy forestation. Of course it's still intense when it is shining, but not like when I lived at more southern location.

(and I'm not doubting your statement, just delving a little deeper also.)
My local friend has lav's (currently Ameraucana) and so do I. I haven't had creaminess like that and she does. We didn't get ours from the same line. I didn't experience it when I tried Orps (semi short term) either. I consider it mostly genetic... something I would select against, other things like body type before color of course.
That being said, OP.. no it isn't the lighting as I have seen it in other birds.
If I had the ability and wanted to show.. maybe try him, just for the experience. I also don't think he will fare well in judging... but I try to be encouraging, anything's possible.
With lots of people liking the Lav Orp's, and many having the ability to breed toward the SOP (not accepted by APA as noted, but still has some guidelines set)... might be lot's of competition. Or not much. I'm sure there are many other people showing hatchery birds at lots of fairs.. If I was though.. I would order a bunch and grow them all out... selecting the best to show...
Oh wait, I see you say it's the state fair.. not even just county... expect and enjoy the competition and the learning if ya go!