So I was just downloading some things and I checked out the speed in my NZB downloader. I pay for 6/768, but to my surprise, the download speed was 11425 KB/s instead of the normal ~700. It stayed this way for about 10 minutes then it looks like I lost it.
I can tell those screen captures are from Grabit as I have experienced the same thing from that application while downloading from Usenet. Unfortunately they are not real world results but rather a erroneous measurement as graysonf has already pointed out.