The ARCHIVES say that Wally and Ralph are smarter than Clark.
No, there’s tons of examples of Lois calling Clark pocket lint and pond scum.
Although, now that I think about it, it would have to be 8-9 months and enough time for the child to show extra human abilities (if it ever did).
CLARK: Good thing I'm a patient fellow.
LOIS:<not happy about living 10-15 years of marriage without consummating>
Oops?

Michael