USB 2 cables faster?

Hi

I have been getting conflicting advice from different specialist
dealers on whether I should use a USB 2 cable with my Toucam ProII
840K/20 webcam. The first sold me an active 5 metre Sandberg cable with
only USB 1.0, USB 1.1 spec and told me that the cable doesn't matter at
all whether for USB 1.0 or USB 2.0. I had already installed a new USB
2.0 card because the Toucam ProII didn't seem happy on USB 1.

The next dealer sold me a 5 metre passive USB2 cable and insisted that
a USB 2 cable was essential to work with USB2 devices and cards because
of the high speed requirements.

Both cables seem to work independantly or chained together and I'm
getting 30FPS in reasonable light with both linked if that's any
indicator of speed.

Your usual expert advice would be most gratefully received in this
matter. Even browsing doesn't seem to offer clear answers. If this USB
1.1 cable should be returned as inadequate for USB 2 it ought to be
fairly soon.

Thanks
Chris.B