Depression to take a few weeks to reverse if you just get enough stimulation? Gee, nice to hear. Maybe I'll just try that.
On average it will reverse regardless since the half-life of depression is only a few weeks, unless you take antidepressants in which case it's perhaps less severe but is also less likely to go away.
Why are you posting absolute nonsense here?
Are you referring to a single major depressive episode? And presumably not referring to the various other depressive disorders that last months to years?
FWIW, this one of many things that makes treating "depression" challenging - there are many different forms of depression, and not infrequently the underlying pathology is quite different.
Yeah if you read Anatomy of an Epidemic, Robert Whitaker has a good research review of all the large scale NIMH/NIH studies.