I haven't had PB since last summer when Comcast updated me to 50/10 and really I haven't missed it. PB was useful back in the days of 6 or even 12 Mbps connections, but as speeds increased it lost it's usefulness.
These days, when I can download a 1 GB file in under 3 minutes, the extra few seconds PB would shave off the download is meaningless.
Not to mention that I rarely find servers capable of actually delivering 50 Mbps download speeds, so PB won't really help in that case anyway.
Upload PB is still kind of useful, but the vast majority of people don't do a lot of uploading or if they do, it can be done in the background where upload time isn't as relevant.--
The Comcast Disney Avatar has been retired.