I won't argue with you about the experience you have had with the increase in ram but if you don't notice any difference in normal running over the next week i will not post another thing on this site as i know you will see an improvement.

I have been in IT for many years and ram is the cheapest upgrade you can perform, i recently increased mine from 4gigs to 8gigs a bit of over kill but it was cheap, i also installed an SSD drive as my main drive and can say they run fantastic.