I have to question some of your points:
"About the "rope theory" . Why not stick to heavy partial reps only if u cannot stress specific fibers."
Because using partial range movements the strength transfer to other parts of the lift are small, usually plus or minus 15 degrees. also, even though you may be lifting more weight your muscles are actually contracting with LESS force due to mechanical factors such as leverage. In addition, the Time Under Tension is not long enough unless the partial is performed VERY slowely, which negates the actual purpose of the partial. Partials also do not train the movement through the full ROM, which in certain cases can lead to muscle imblances are injury.
"Well.... general opinion is that not all the fibers will fully contract, so in line with this i think that changing exercises can make a noticable difference WITHIN you genetic bounderies."
What do you mean "fully contract". As soon as a muscle fiber is activated by the nervous system (through motor units) it contracts...You can't contract one fiber more than another fiber. Also, motor units fire on the all-or-none law which means if the innervation fires, the whole thing fires. Changing exercises is a good thing in general (for mass training), but it will in no way change the shape of your muscles. An another note, frequent switching of exercises between sessions is counter-productive to gaining muscle.
"I definately can say that my median chest filled up better after i decided to focus on heavy dumbell presses instead of barbells."
As your chest grows as a whole so will your "inner" chest. Makes sense after all, a muscle will grow across its origin to its insertion...will there be disproportionate growth in the easter latitude of your clavicular pec? Of course not.
"
I think Cackerot and his followers DO have an important point, that you shouldnt wind up doing countless sets of tiny detailed exercises in oerder to 'bring out the outer tricep head' , but rather stick do as few setrs as possible doing basic exercise. But within this group of basic exerc ises there are still some varibles you can change like range of motion (bb db) flat, incline, decline etc and I still believe, depending on muscle attachments certain exercises work better for certain individuals."
Yeah, we do have a point don't we?
"....Lately I started listening more to the HIT advacates... I might take another 6 months of hardcore indoctrination before i become a certified HIT jedi hehe"
I am not an HIT-Jedi. when i hear the words "HIT-Jedi" I think - egotistical close minded individuals. If you ever wandered over to wannabebig.com you would know what I'm talking about. Yes, I think lower volume is better most of the time for most of the population but it's not the best all of the time for everyone.