2mbps downloads using a 75mbps service

I recently upgraded from a 25mbps internet service to a 75mbps service, and yet I still am only downloading (using WinSCP) at a rate of 2mbps.

Is there something I'm missing? The speed setting pulldown in the download progress popup window is set to Unlimited. Any other settings I need to change to get a reasonable speed in WinSCP?

Win7Pro

Do you get better throughput using any other client (using the same protocol)?

I've only used WinSCP since the speed upgrade, but previously (until it became incompatible with Firefox), I was using FireFTP, and I believe I was getting similar low speeds.
Doing a speedtest (speedtest.net), I was hitting the proper speeds for my internet package every time.
I'm wondering if there's not some setting in either WinSCP or Windows7 that might be hindering it.
I can't really speak for downloads in things like YouTube, as it's hard to tell how fast it actually is, relative to how fast it should be, without a speed reading.

I'm not a networking expert, so I cannot advice on this. Sorry.