If you have any doubts try to play George Harrison's (the Beatles') song "Here Comes The Sun" in the proper key without a capo (hint=capo behind/at 7th fret). You don't have enough fingers. Sometimes problematic, though, as in the forementioned song with capo behind 7th fret, the fret spacing becomes considerably more narrow the further up the neck you go-so for a guy like me with big hands/long fingers it becomes difficult to place your fingers in the correct positioning (i.e. easy to finger the wrong or # fret). It's funny, but most people tend to think that if you have long or extra long fingers that you would naturally be a better guitarist (longer reach) but it actually can really be a hindrance in the upper neck registers.