When my kids are hogging my PC which has i5 processor a gig graphic card and 4 gig Ram I often use the PC which is meant to be for them which has 1 gig of Ram, 2.8 ghz dual core & no graphic card I get a perfectly smooth meter most of the time (apart from the odd pause now and again) but I put that down to internet or some one in house using laptop aswel) I have only 6.5 mbs internet speed, so I'm amazed at the smoothness and game-play i get on a PC which is WAY BELOW the minimum requirements. I spend most of the time playing the 5hit PC as i keep better PC for music production.
I might be lucky, but one thing which might be of use, the flash plug-in I use is a very old version but I play my game on highest flsh quality, and no added program like gamebooster (i can even have flag animations on and still get a smooth meter)
If I can get smooth game with my PC, I'm sure the rest of players could with their higher spec PC. (or is it easier to blame the meter for a slow reactions rather than yourself.LOL)