Really no idea on the whites since I am just doing my first white kit now. Everything I have read says whites are generally ready much sooner than reds.
The only "early drinking" red I made was a WE Mezza Luna Red, which I can't enjoy yet after 6 months.
All the other kits I have made have been premium (16+ L) and the only one of those I have found I can drink before 12+ months is an MM Renaissance Amorosso I made a couple of months back. I was really surprised by that one. Still not great though.
Regarding the Pinot Noir, I recall reading that varietal is tough to get right in a kit, and since I am not much of a fan I haven't tried one yet.
I will also echo what others already said: if you want to experiment try Dragon Blood. While not a red (sorta blush I guess, if only in color), it is inexpensive, easy, and decent in a couple of months:
http://www.winemakingtalk.com/forum/f2/dangerdaves-dragon-blood-wine-41825/
Bottom line: it depends on your taste. I may be overly critical, so take this with a grain of salt, but as a general rule I wouldn't expect reds to be decent in 4 months. By decent I am thinking $8+ bottle commercial equivalent.