I would think it is obvious, all other things being equal, that fewer letters are more memorable, easier to type, etc. Of course, if it is 5-letter gibberish v

I would think it is obvious, all other things being equal, that fewer letters are more memorable, easier to type, etc. Of course, if it is 5-letter gibberish versus 6- or 7-letter "real" words, the real words would probably win. But now, we have arguably "real" words like "Google" and "Ebay" which were in the "gibberish" category 15 years ago. So that makes pronounceable gibberish look better than, say, "Amazon", which out of context still means a tribe or river just as much as a web store. So it is more like "it depends", than "there is no extra value".