First grow beginning flowering pics, your predictions?

So this is a first grow, with plants rebounding from sever tortures inadvertantly inflicted upon them in ignorance. They are 5 days into flowering, how much bigger do you think they are going to get. The biggest is trainwreck and the second healthiest is NYD, the thrid is unidentified and wilting. What do you think the chances are of them making it through harvest with decent bud production? THey are under a 600watt hps with an additional 4 foot shop light with grow bulbs and planted in coco fiber.

at least double in size if u keep the stress to a minimual

I put a plant in flowering six days ago, when it was 35.5 inches tall (counting the pot). Now it's around 44 inches tall, so almost 9 inches of growth in 6 days. They can double or even triple in size when you flower them. Double is more my experience. I'm kinda scared my plant is going to get TOO big, can barely stuff it in a closet now as it is, and it'll probably grow an inch a day for a while yet.

As for yield, nobody can really predict that, as there are just too many variables. But you have good lighting, so it should be quite decent. ;)