I say let it go one more week if you can...it will get even more funky. It does look close though...remember, they stop packing on more flowers in the last week or two normally and just swell up and thicken as well as produce more complex sugars and oils..."Candy Up" as I call it. At this point you better be flushing with pure water and letting the plant use up all the stored nitrogen..I would wait until the leaves fall off and go totally yellow then it will literally be like candy and get even more purple. This is on the very early side of being done from what I can see in the pics, don't always just go by pistil color. Your plants do still have alot of "green" in them. Now as far as fast strains go..remember, there are old shishkaberry strains out there and hash plant clones that are done in 5 1/2 to 6 weeks..and I mean DONE DONE DONE. I saw a grow one time where my buddy flowered a whole room in 35 days with the old spice of life shishka's..and it was really funky and totally swollen, stacked out tower calyx's on the bud ends and everything caked in white crystals that were like little mushrooms. Very early fast strains do exist and with Co2 early in flower and lots of light, water, & good nutes with good temps and the right humidity levels you can normally shave a week off most "normal" flowering times. The fastest strain based on all factors I ever saw with the highest yield, best looking buds, and most soaring potency was "Shit" by Mr. Nice in a flat 6 weeks...that stuff is scary strong and grows like a madman. I'm talking big silvery glistening donkey dicks of it in 6 wks that smelled like rotten juicy fruit & skunk ass mixed together with a turd in jet fuel. lol

So what does this purple yum yum you have going smell like?