I found it! Everybody's invited to take a look at:
http://www.tug.org/TUGboat/Articles/tb19-2/tb59inn.pdf
On Sat, 29 Jul 2000, Asmus Freytag wrote:
> If you will, the 'common man's' idea of what a proper Euro glyph is, is
> fast becoming influenced by what he sees on a daily basis, not by the
> origin of the glyph or by the logo (which is prescribed only for its
> appearance on the currency itself).
Ok, but I only want to know about the historical origins.
> Given the name, I'm sure even the 'non-European' font designers that Werner
> likes to blame aren't suggesting that the logo for the 'e'uro is based on a
> 'c'. However, when you try to put the thing together with the serifs used
> in many of the common type faces, the result can indeed look a bit like a
> 'c'. This seems particularly true for monospaced fonts.
Take a look at the referenced article.