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.
Thanks @theblindsquirl
for the link, it was very interesting to read more in depth studies.