Well, at the time I stated this (a year ago) I was growing with limited space--and maxed around 21-24inches tall with 3 or 4 plants in a 2x3ft area 4 feet tall. So 3-4 plants yielding between 1 and 2oz at 2ft tall was good enough for me and my girl.
If you want more, and you have the space to do it, then by all means go for a few more weeks, I was stating that if you you have space/time restrictions, then vegging for 3 weeks (+~1wk for seedling) with a short-flowering indica can be rather rewarding--of course this all depends on how vigorous the plant is, I usually flowered at 5-7 internodes.