Alright, using M1 100Mbps - before activation ard 25Mbps to 35Mbps... (Peak Period I think)
Lets see what is the difference after activating Qos,
http://www.speedtest.net/result/1643650
seems speed is improved.
No harm trying it out btw.
i gonna call orange soon to push up more speed in my side.
overall upload and download, im satisfied with it, than what i had used previously.
how to do it btw? for huawei hg256
login default ip is 192.168.1.1
type this in the web browser address 192.168.1.1
you should see this

user: admin
password: admin
there she goes

Click on Advanced, QoS
check Enable
and submit. you are good to go to try it out.
www.speedtest.net
www.speedtest.com.sg