I second that. I have been testing now since last week. On wi-fi at work, download speeds are blazing fast, with downloads consistently over 10.0 mpbs and as high as 18.0 mbps. In contrast, when I use cellular connection at home, download speeds are consistently below 2.0 mbps- and as often as not, less than 1.0 mbps. Last night, for most of the evening, I was getting errors "cannot load page, check your connection" with signal at 4G and 3-5 bars.
I am a new customer to at&t, with 4G, 4GB data and tethering. Since mine is a new account rather than grandfathered from 3G, I should have 4G activated on my account (I will check this). My reason for adding tethering was to have web access via computer at home, on cellular. As already mentioned by previous poster, 4GB data will be useless at these speeds. Tethering for the purposes I intended for random use at home, will be impossible given the further cut in speeds.
I use web, text, and email. I do not stream movies or music, and the only game I play is the rare game of Words by Post (not yet downloaded on my Titan). These speeds are untenable even for this most basic use.
It does seem like something has been done to limit data speeds on cellular connection. The device is capable of very high speeds on wi-fi. I have the BandWidth test history on my phone to show it.
I will be going to at&t to look into this. Device that is fully functional only on wi-fi is pretty much useless to me. It is the times when I am away from wi-fi when I need it to be *most* reliable.