Silly question, but I'm not finding the answer right away when I google it.

I connect my iPhone 6s Plus to my computer via a Lightning Dock that I bought at the same time as I bought the 6s Plus. I have the choice to connect its USB cable to either USB3 or USB2 ports, on either my computer, or my USB3 hub, or a USB2 hub.

When using this configuration to perform a sync or backup of my iPhone, is there a speed advantage to connecting it to the USB3 connection type? Or will it just behave like USB2 no matter what?

It's hard to get a straight answer from Google. This thread has conflicting answers and conflicting screen shots: https://discussions.apple.com/thread/6532848?start=0