VZ throttling certain apps?

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http://forum.xda-developers.com – I live in the southeast and use WiFi tether on my phone, unlimited data plan, only 6Gb this month thus far. From this location I have a Slingbox setup on a 40mb/5mb cable connection and a computer with FTP setup. Currently I am in Hawaii with a strong 4g connection at all times and... When I try to stream my Slingbox onto my tablet I can only get 100kbit/s, bad quality. When I download a file to my phone from FTP, it starts at 300k/s and slows to 100k/s very slowly and consistently. However when I download file from Play Store I get 800-1.5Mb/s. When I stream from ESPN I get high quality as (HowTos)