I hate the whole "hard work," but not "long hours" sort of discussion. Basically, if you work hard, but not long and succeed, then your hard work was "valid", if you work "long hours", which by some definition is "hard work" but don't succeed then it was just "long hours" and not "hard work."

In other words, as long as you succeed whatever work you did is considered "hard work" or "working smart", etc. etc.