How Fast Should i Expect my Plants to Grow?

sup yall....i transplanted my clones about 3 days ago- how fast will they grow? I know this is very general lol Basically what im asking is when should i expect rapid veg growth? I only have 1 or 2 that look like they may have been "shocked" a little by transplant. Leaves look healthy tho. Fed them yesterday morning at 8am & last night @ about 10pm. Does this sound about right? 8 plants (5 gallon pots), Basement room 10x10, 2- 600 watt HPS (about 3 ft. from the top of plants), Sunshine #4 soil-less aggregate mix and i'm using the "flora" nute system, temp is approx. 78 with 51% humidity

End of Week 3 veg. they're all approx. 12-16 inches tall & about the same in diameter. Skunk is a little shorter/less leaves. G13 is bright & has a lot of leaves poppin up everywhere. Bubbas have a lot of fat/dark leaves. One out of 8 didn't survive transplant. I topped the plants about 5 days ago and all were very successful except 1 i miseed :/ Im now running 1 600 MH & 1 600 HPS @ 18/6 and feeding them each about a quarter gallon every 1 & 1/2- 2 days

Video...Week 3 Veg
http://www.youtube.com/watch?v=IsBhymBwnwI&feature=youtu.be&noredirect=1

Depends on genetics.

Also depends on how much light you give them, Ed Rosenthal states that plants grown under 24 hours of light grow 33% faster.

faster...yes. but does that equal more yield? i've read a few studies that showed root length was the greatest on an 18/6 cycle (stating that root length is directly related to yield amount). I'm by no means an expert and it's my first crop- so i'm trying to be as economically efficient as possible. Thx for the info!

At first it looks like they are pretty slow growing until you mention putting them into 5-gallon pots. A newly transplanted seedling
sends down roots as soon as it becomes acclimated to the new pot. This is going to take a while because you didn't use an intermediate-size pot.
I have found I get faster early growth if I transplant from the solo cup to a 2-quart in-between pot before moving up to a 3 or 5-gallon pot.

here's a little trick I picked up -- you can pretty much tell where the seedlings roots are by looking at the leaf spread. By the time the leaves
are just about as wide as the pot itself -- that's when your roots are just hitting the side of the pot. Look straight down at the plant from above and see what I mean.
That is usually a good time to transplant, just when the leaves are as big as the pot.

Good luck, BigSteve.