Sleep Deprivation is a pervasive problem in today's society.
Your post is spot-on.
Here's a link to an article that not only backs up everything you say in your post at Mercola_dot_com it gives links to the studies where the data comes from.
But, be forewarned, late night computer use can have detrimental effects on sleep patterns.
for the link, it was very interesting to read more in depth studies.Thanks @theblindsquirl