The English idiom "don't judge a book by its cover" (common phrase) is also applies to a web development industry. Here is the expression of an owner of the site left by the developer when the website was not 100% completed:
Hello all, I've had a Drupal developer/"expert" pretty much walk away from completing the final steps in getting my IT services site going. He did most of the shopping cart integration (UberCart) and site construction, but has left many little unfinished parts to it. He swore that he was a skilled developer and from his resume, it looked to be the case. Seems his business ethics need some work.
From the above quote we can conclude that a resume should not be made as the main guideline in determining a person's ability.