Less Really is More!
A highway billboard has about 2 seconds to get its point across to oncoming drivers before they're long gone. Similarly, a TV commercial has 30 seconds and a radio ad gets a whole minute to share information with hopes that the message won't be forgotten as soon as the spot ends. On the other hand, too much information and we tune it out altogether.
Your website is different than an advertisement in that it doesn't need to fight to get a customer's attention: they're already there. People on your webpages either already know about your company/product, or they want information. Potential leads want to find what they're looking for as easily as possible, and if they can't they'll likely just go search somewhere else. We just don't have the time or mental energy to expend.
If a client has to scroll down to read on “below the fold”, chances are you have too much information on your page that may not all need to be there. Or maybe all that information needs to be broken up and organized a little better to make it easier to chew through. All this stuff is very impressive, but it's not helping me find what I'm here for. What I want is here, but where here? Our attention span is very limited, our patience even less...
come to think of it, are you still reading this?