This was a post published by Harvard Business Review, which is a little surprising, given the stature a business plan occupies around Harvard.
However, our own experience confirms what Harvard is saying: when funding, v.c.’s will look more at the concept and the management than they will the plan in hand.
Business plans change all the time, so there are various things that are more important, starting with passion and purpose.
Here’s the link to the HBR article: http://blogs.hbr.org/cs/2013/02/entrepreneurs_youre_more_impor.html