the rootbound myth.... or is it?

Some people say rootbound is a myth.... some people dont. So, I want a poll, and evidence. Basically I have some 2-3 footers in 1 gallon pots, just put them in flowering a few days ago, already started in those few days growing upwards a few more inches (id say 5 days an inch or two each).
So, what do you think? Party cups healthy at 1 foot? Is it really just other factors that people blame on the plant being rootbound?

All input appreciated, I am considering after I take a couple other of my plants down to switch some of the little guys into 2 gallons, but I dont want them to put energy into rooting and I dont want to waste my time if I dont have to....

I don't know what you are smoking. Rootbound is not a myth and no one in their right minds would think that it is a myth.
As a plant grows, so does it's roots system. At some point, it will outgrow its container.
read this:
http://www.evergreengardenworks.com/rootball.htm
"Intact Rootball Vs. Rootbound"

by Brent Walston
edited by Robert Potts

i dnt think its a myth so much, but i beleive ppl make it out to be worse than it is, but it is bad, for instance, u can have a 6 footer in a 1 gal pot, and theres gonna be more roots than soil in the pot, ur gonna have to water like crazy, and in the end ur yield is gonna be a hell of a lot less than if it were in a larger container or even the ground, so its not necessarily gonna kill ur plant but there are alot of downfalls to it, last year i had a buddy that had a plant in a 1 gal pot, not even filled to the top w/ soil end of harvest, he had roughly a little more than a 1/4 oz dry, and the quality was horrible, this was also about a 3ft plant, nice and bushy too, so u can grow a plant start to finish in a 1 gal if u want, but y do that, dnt u want the max ur plant can get, i kno i do

for me, the plant just droops and slows down growing for awhile.

checking the roots, at this stage, it has always filled out the rootzone.

transplant and voila, back in business.

you can grow the plant past this point and the leaves stop dropping, but the growth is slower.

its rare i see a grower grow a tree in a cup and the one time i remember an explanation following (you could just cut off all the roots and stuff it into a cup..)

they talked of mychorrisa (sic) which i havent even tried or even remember how to spell

usually i dont grow the plants so big, so i dont need that much soil anyway.. rootbound is rarely a problem. (and i grow just 7-9 under a 600w)

10l pots usually.

bump... w update

so no one voted... ok ive been in the other thread workin away telling people if there plant is ready to harvest... id hope they would come here and at least vote... but no votes

I just put them in 2 gallon containters, they range from 16" to 26"... hope i didnt stress them from transplant shock... all the ones i moved were fully rooted (or bound by some standards)... so at least i wont have to water as often...please input from pros, or anyone... aka the infamous small pot big plant pro