Cheese strain yield

Is their any truth to the cheese yield or is it just a great big fairy tale? If there's anyone with some experience with this strain feel free to give some advice. also does anyone get good yields from vortex and blue dream? Anything would help but i would like to see some pics while in last three weeks of flowering so i could see and judge for myself....

i've grown Swiss cheese, i was growing pre 99 skunk and master kush at the same time the Swiss cheese had at least a 15-30% heavier yield. but it also depends on the seed supplier. i have 2 variations a 50-50ish sativa indica Christmas tree style, and then there's what i can assume is about a 80-20 indica sativa low dense heavy branching bush. i got both of them from nirvana through attitude seed bank bought 5 regular seeds had 4 females and 1 male. since then i've bought Swiss cheese from a couple other seed banks and they were either the wrong strain all together or the genetics were crap.
it is a bit of a fairy tale but cheese strains IMO produce a substantial amount more weed.

i'll tell you what there's truth in: diligent research, thorough preparation, and careful execution. that's where the big yields are.