no offense tbombz, but the answer to your question depends on what it is that triggers hypertrophy. I doubt that "feeling" a muscle blow-up is indicative of hypertrophy, unless ofcourse you have evidence for this. We should never go by feeling, just because we feel like it... only if the science, or solid experience says it is true (I say experience because the 'science' of bodybuilding is relatively poorly researched).
What I am trying to say is that something may seem intuitively right, but it may in fact be totally wrong! For example, some one may feel, as many novice trainers do, that working out each muscle everyday produces the best training results. But ofcourse we know that the science and experience goes contrary to this. Now we await the evidence for "feeling" the pump in the muscle and its correlation to hypertrophy 
i agree with you very much.
research the science behind what triggers hypertrophy. trauma to the muscle. beat the shit out of the mother fucker. thats what does it, thats what kick starts the process and activates satellite cells and ramps up sarcoplasm volume and triggers all sorts of various anabolic pathways and signals for all kinds of various anabolic hormones.
the question is, how much trauma is too much ? well i think that as long as you keep feeling increasingly swole and energetic as the sets go on, then you havent done too much yet.
some days it will be after 15 sets, sometimes 35. thats a refelection of changing nutrient intake, changing hormonal levels, rest between last workout, etc etc.
