The letter "W" is an interesting one. Besides being the twenty-third letter in the alphabet, it is the only one having more than one syllable; it has three — unless it is pronounced with two: dub-yah.
It is more than a bit ironic that — as a truncated single-letter brand — W, in most cases, has three times the syllables when spoken, as compared to any other single-letter brand. So, while it may be more visually efficient, it clearly lacks auditory efficiency.
As to the question posed by the title of this blog post, here are some possible answers:
To the extent any are unfamiliar to you, clicking on the image will reveal the source of the particular W logo.
Notwithstanding the existence of this multitude, Wendy’s would have us believe that adding the word "the" — definite article in the English language — yields the only true W (albeit unregistered):
Apparently I’m not the only skeptic to wonder about the scope of rights associated with single-letter "W" marks, only a week ago Gallagher Blogs wrote on the subject, apparently inspired by University of Washington’s "W Day" celebration of the University’s 150th anniversary.
By the way, when do you suppose the world’s largest retailer will truncate to W?
UPDATE: Thanks, Leslie, Wegman’s is a little outside of my shopping area, but you must be speaking of this: