The most interesting thing about this, beside the metahumor and Schulz playfully mocking his own pretensions, is that Charlie Brown's work on the comic is rather large. Of course, most cartoonists work at a scale we would consider to be very large, and artists for realistic strips are known to work larger still. But unless Charlie Brown were a serious comics groupie, he wouldn't know that. (Schulz may have been such a groupie himself; he might have known as a kid.)