I am on Comcast, at their 150/20 service level, and have had my Whitebox for about a month. So far, the reported numbers are uniformly (if not hugely) better than 'advertised'. Download speeds are usually around 170 Mb/sec, and upload speeds hover around 23.8 Mb/sec. Interestingly, there appear to be consistent speed glitches around 21:00 CDT - the rare occasions on which my download speed has (transiently) dropped below 150 Mb/sec have all been around this time, and more minor slowdowns occur around then almost every night.