It very much depends on the situation. In an engineering environment (industrial control, regular applications, aerospace and so on) slower really is faster. But in a SAAS prototyping race with a whole bunch of like-minded characters those who cut corners may very well win the race. This is frustrating to those of us (including me!) who would rather do a proper job but the 'cowboys' seem to be both getting the funding and seem to be statistically doing better at success in the longer term. Of course plenty of the cowboys die with self inflicted bullet holes but the press does not seem to care and neither do investors. It's there on every level from 'go big or go home' to 'don't be scared to break stuff' to 'oh, we went bust, sorry customers, we'll try better next time'.