The contemporary staff portrait is a almost a necessity these days. If you click on any company web site and go to the 'about us' page you are sure to see a collection of portraits that show each board member or the key staff.
How often though do you see some really terrible photos? I would suggest it would be very often. The web site can be all bells and whistles and have an eye catching home page, but if your potential customers come across a photo of the MD in a badly lit room with a pot plant coming out of the back of their head then that could be a real problem. It's all about creating a professional image and being seen to have pride in the business.