Most current research studies the effects of chronic sleep deprivation–what happens when you take an 8-hour sleeper and make her sleep for 4-h a night for a week?

I suspect that the various red tape surrounding science research has something to do with it:

1. It’s easier to get funding for research showing how shortened sleep is bad.

2. Scientists, for publication reasons, tend towards drastic and highly significant results. Studying the nuances of 7-h vs 8-h vs 9-h aren’t very interesting from a publication standpoint (but certainly are from a personal lifestyle standpoint).

3. Long term research is what’s needed for studying naturally short sleep. Long term studies are more difficult, time-consuming (duh), and more costly.

I certainly have not exhausted the sleep literature, so if anyone finds more recent studies on naturally short vs. naturally long sleep, contact me.

Are there any other current latest studies/research?
Does this findings still holds true? Maybe with an extra 38 years of more data, new findings may have surfaced.