Fibre Optic Download Speeds

[#1]

Hi,
I've had fibre optic installed for about a week.
I get approximately 20meg ....... i dunno if this is good or if its what i should be getting but it is better than the 2meg i was getting previously.
despite this......when it comes to downloading a file the speeds are still really slow?!
for example, when i was downloading the java plugin to do the speedtest it took approx 12 mins to download 67mb?!? is this right?
another example would be torrent files......regardless of the popularity of the files the download speeds max out at about 120kb/s....on regular broadband i would get 330kb/s......
If i stream HD content on my xbox i do notice that the new fibre optic allows me to do this where i couldnt before.....so i benefit from this
Can anyone advise why downloads are so slow? is it something i can do or is the fibre being limited? would i get better download speeds overnight?
I'm enjoying the new broadband but if my download speeds are gonna be really sluggish i wont benefit much from it.
any explanation / assistance appreciated.
thanks

[#2]

I've run a few checks for you and can't see any obvious issues, I'd advise raising a fault: https://portal.plus.net/apps/kbdfaults

[#3]

It's also worth making sure you are aware of the traffic management that's applied on your account: http://www.plus.net/support/broadband/speed_guide/download_speeds.shtml