Shaw speed profiles - BB100/120 upload speeds

I am a grandfathered BB 100 user. For what I get compared to the newer plans I am happy as the price is competitive. I have essentially been bumped to the BB 120 speed profile, and I consistently top out around 125 Mbps down on speed tests. The new 120 profile says up to 10 Mbps upload, but I am still receiving the original upload speeds of 5-6ish. Is this a modem thing, a speed profile thing or something else? As silly as this sounds I'd really like to be in that 10+ (over provisioned) range. I am running a bunch of server stuff for none-commercial usage, like plex and a few other things so that I can access my files from the "cloud" without paying sky-high prices. Puns! Anyway, do the Shaw gurus that lurk around here have something to say about the matter? I'd really appreciate that. (o:'