Usability of the letter e

Four years ago a spoof article stated "Jakob Nielsen Declares the Letter C Unusable".

Today, the latest edition of Usability News from Wichita State University contains an article that explains why the letter e is least legible in Garamond.

Another article tells us that Courier New is neutral, whilst Calibri (the new Arial) looks professional and Curlz makes you look like a joke.