iS iT tRuE???

I was just flipping through the channels in ASTRO when I saw a research trial going on in Discovery channel. It was about sleep and the test, on how lack of sleep influences people study was done to two groups of people. It was kind of interesting, as lack of sleep is one of my problems these days, especially towards the end of the semester. So anyway, the 1st group is a group of armies while the 2nd one was a lady sailor, sailing around the world for 92 days I think (can't remember precisely). The 1st group was held awake for 3 d
ays without any sleep at all while the 2nd group had only half of her sleep time compared to her usual sleeping time for 92 days. Over that period of time, both the groups were observed and finally, they came to few conclusions; people get tired, not active ( all the usual ones), cranky, mind doesn't work that fast, and to the soldiers, it was also observed that on the 3rd days onwards, they forgot who they were!!Well.. I think the researchers should redo the studies on us (My friends and I). The truth is I don't think any of the things stated above is true when it comes to lacking of sleep. Well maybe some but as far as Ive observed, I feel that in early semester( when we have more than enough sleep), almost all of us are in bad mood, tired all the time, infect we miss classes often, which obviously shows that we are not active at all. On the other hand, towards the end of the semester I've noticed that all of us seem to be happy. We will be singing and acting like small kids whenever we have less than 4 hours of sleep. At the same time we are extreamly energetic and active. We seem to argue a lot as well, which shows that our brains are working. So come to think of it, was the research
wrong? Or is it all because of coffee??