Since i have quite some experience with computers, im fully aware that they are mostly at best temperamental, especially as far as the web is concerned, if i try them and get the same results, thats my experience, others clearly have different experiences, but like everything you propose, just for you i'll keep trying periodically til i get close to your numbers.Obviously, even when you don't know about something, that doesn't stop you from throwing accusations.
On the other hand it will also teach you that sometimes our most trusted systems and notions that we believe in, can decieve us --- as in the case of computers --- we believe that they are constant and stable in their functions, but sometimes it is not the case.