Speeds also depend on your place within the network node map; your home to local to national networks connection layouts, types, infrastructure choices, cabling specs in between, local town/are/region etc internet traffic 'culture'/habits of usage and how that all inter relates world wide in some way too.
There are some settings/advice on the net for improving connections, but you have to get really techy and know stuff about sub-routines, modem/wifi bios editing &/or bios coding.
Thats assuming you can locate such info from reputably clean/trusted/respected sites or have such info allowed in you country before implimenting those sort of tweeks.
There are some port settings any minor stuff that can be tweeked in you torrent program to assist speeds, but I don't alter much or know them - a freind of mine set up my settings explaining them at the time, but that was a few years back.
Frictions right on the money with what he says, less open/running programs is best - you might be able to set what times to automatically switch on & off downloads between certain chosen times. I find personly that I get my best speeds in Birmingham, around 3am - 5am, ...or when my flatmate isn't playing WoW.
Hypertheoretically, assuming your national culture goes generally to sleep at 10pm, net traffic droping off by say, 1/5, its internet culture will largely still be going through to maybe 01am where another 1/5 goes to sleep.
At least 1/5 never disconnects without reason, the rest float in and out and, or are from different timezones/networks, scheduled/user-selected-automatic-program-functions/connections, bususiness networks & multi noded/hubbed networks, national systems/organisations and all ther rest.