If you grow 2 Auto seeds and one is in a 1 gal pot and one is in a 2 gal pot, no Airdomes...just normal. The 1 gal pot plant will almost always start flowering first and finish sooner. There is a correlation between root growth and flower induction. I believe that is one reason many of the growers on here have plants going 80-100 days. The size of the plant can lengthen your entire grow Cycle With Autos. I have a perfect example, I have a coup!e Of 3BOG plants. One is in A Smaller pot 1/2 gal, no Airdome and it is much smaller. It is ready to be flushed, looks killer...but 1/2 the size of the other plant. The other is in a 1gal pot. It is much larger, and needs an easy 7-10 days. Different phenos can cause this...but plant size is the real reason for the faster finish. Air injection increases root growth, which in return sparks flowering faster.
Mitch From Mephisto stuffs a lot of plants in small spaces, But Yields are not huge. They do not embelish flowering times. They do 2 Things that Help Speed Things Up. Or Not Slow Them Down Shall We Say. First, they and I prefer to start Our Seedlings In Small Pots And then transfer to larger Pots later. If done correctly the plants will grow roots better, grow faster, and show sex sooner. This is a fact. Transplanting them at the right time makes them dive right into flowering...instead of vegging longer. If you are looking to do more plants and turn them over faster...that is the way. If you want less plants and want to SCROG, use a,larger pot to ensure a longer veg cycle. Some People claim Autos have a SET time span before they flower. Bull crap. Just overwatering alone can extend your veg time. Lots of factors for different grow times with Autos. I personally got into experimenting with Autos to turn over plants fast and get a variety of strains in a smaller space. With much experimentation I have definitely found ways to manipulate Autos. The real key to growing successfully is to find each strains natural growth is. Then manipulate it to your wants/needs. I have grown a 3BOG in DWC, 5 gal Bucket. Massive plant. Would take up a 4x4 tent by herself!!! That is a small/medium sized strain when you do it in a small pot. I could fit 9 small ones OR 4-6 medium 3BOG in the same 4x4 space. FWIW, increased size doesn't translate to improved yields always. Nor does size translate to improved quality. Many times large plants have more waste and varying qualities of material on the same plant.