i agree that those look heavily sativa dominant, also, judging by the pics and
my own experience, i'd say that your plants don't look to be more than a month
into flowering. (get yourself a handheld microscope, at Radio Shack and
Amazon for under $20.00)

do you remember when you put them in? that's important because sativa's,
especially pure sativa's, can take 12 to 14 weeks to finish.

also, don't be discouraged by your first yield, each grow is a learning experience
for the next so, as long as you keep trying, your yields will improve. my own 1st
crop only yielded about 3 grams per plant and now i get about 1\2 ounce per so
a vast improvement. (i run a SOG so my plants are small)

here's a couple of pics of one of my sativas and this one doesn't finish for at least
12 weeks, 14 is even better but it tends to hermie when i take it all the way.

anyway, even with the long wait, it's so good, its worth waiting for, plus, it
yields very well. it's supposed to be Legends High-End

1) 3 ready for the flip, LHE in the middle

2) the LHE about a month in

3) 2 different LHE's at different stages, the one on the right split early into
....3 seperate cola's while the other's did not

4) this is about 8 weeks in, another month to go. (note the lighter for perspective)

5) a view of my 'fruiting chamber' aka my bedroom closet, lol.

anyway, i'll say again, don't be discouraged, try to remember that when you
start at the bottom, you can only go up!

you will do better next time, as long as there is a next time.