I agree with JTOOTS. I find a definite advantage of racking beer to a secondary at about S.G.1020, Around 12 days, and bubbler activity slowed to about 45 seconds . If you angle your hose right in the bottom of the carboy, there is a swirl motion created. This is a type of whirpooling, same as the last few minutes of the boil with Irish Moss. This whirpool action and clean glass bottom settles the beer out in a matter of days. It begins immediately, with sediment accumulating within an hour. I really think beer clears much faster by doing this. I have left beer in the primary many moons ago and found it takes about a week longer (sometimes two) to settle, clear and finish fermenting. The beer is still able to finish off fermenting and leaves a nice little yeast film on the bottom of the secondary. I am able to brew again because the primary is freed up, and when the SG drops to 4 points above terminal, I bottle 6- 500 ml bottles and fill a 19 liter ball lock s.s. Corny keg. It can carbonate under keg pressure 28 psi and finish fermenting at the same time, about 5 five days; and the captured bottle ferment will carbonate the bottles.( in about 14 days at room temperature) I am now drinking a reasonably clear pilsner that was brewed 18 days ago, March 28. In a week it will be completely clear and be officially "Ready"
Also like to dry hop in carboy secondary, and let it clear/settle out. takes about a week longer.
I am a newbie on this board but have my original C.A.B.A. (Canadian Amateur Brewing Association) membership from 1986 and have brewed hundreds of 6 gallon batches, one 24 us gal batch,and two 12 gallon batches.