@izzythepush,
Actually, Frank is boasting all the time.
Not only about IQ but also about all kinds of matters.
He boasts about his "excellent grasp of the English language", having been in a previous life, an editor.
Having read quite a lot of his utterances, and even with my limited skills of your fine language (English), his proficiency didn't strike me as particularly impressive.
On other fields, I consider his knowledge to be average to nonexistent.
This said, he excels in boasting: