As someone who's often guilty of just the thing Charlie Brown is doing here, I have to say I find this hilarious.
Lucy seems to have the ability to exclaim, not just in serif lettering, but with lowercase letters too! This isn't even the fanciest writing we'll see this week.
Charlie Brown's spirit hasn't been beaten down quite so much yet.
How do the girls hear those fancy signals? Does Charlie Brown adapt a different tone of voice? Those typefaces are very well-rendered. Schulz was a true artist, but he was a great craftsman too. All of this done for a throwaway joke one Friday in 1954. I wonder if he worked from reference typefaces when he drew this one.
(This strip is a copy of the previous one in gocomics' browse order. I don't know what's supposed to go here.)
Those are some great backgrounds in panels one and three. They must have taken Charles Schulz a long time to do! The juxtaposition of the deceptively simple characters and the elaborate, realistic backgrounds is one of the many little joys of classic Peanuts.