Ok.. after testing Dlink Stock firmware with Streamboost ON and OFF and OpenWRT with SQM ON and OFF, I have just one thing to say:
STREAMBOOST TOTALLY ROCKS!!!
It managed to keep ping low even in high bandwidth situations. Look at the benchmarks below.
The cenario I took was the following:
1 - Open Battlefield's Battelog screen to search for servers.
2 - Took a screenshot of the BF4 servers ping list with the internet bandwidth idle
3 - Start 5 torrents and an ISO download using Free Download Manager until maximum bandwidth is achived
4 - Open Battlelog screen and check the pings.
The picture bellow is my whole screen when maximum bandwidth was being used with battlelog scren opened as a proof