Well this title is not a thumb rule, but if you are in the Web business like the way I am, then this certainly holds true for you.
My own experience is that the general client is least bothered about how strong a website you might have built in terms of web technologies, but unless your website is visually appealing, they do not care much about your site's technical aspect. Now that does not mean you develop a lousy website, very poor in technical standars and which is just visually appealing! But if your website is strong in the technical side and also graphically chic, it holds a lot of value for your product.
As, I am writing this blog, today I read in the news today that Slideshare has been bought by Linkedin for about $119 million. And as I started exploring about the team members and person involved with Slideshare I came across this wonderful line from the CEO of Slideshare, Rashmi Sinha. It read:
"Good software comes from a true collaboration between developers and designers." You can read more at: http://rashmisinha.com/about/. And I fully agree with her.
Here's a video you might have a look at which conveys the same with wonderful reasonings: