Speculation and based on what we have seen in press releases so far, probably 1Mbps at a minimum, provided congestion isn't an issue which shouldn't be for a few years at least.
Jezra... Look around a bit, doesn't take a mod to answer that...
†If you exceed your monthly plan data, you will experience reduced data speeds until that start of your next billing period. Reduced speeds may be as low as or lower than 1 Mbps and may cause Web sites to load more slowly or affect the performance of certain activities, such as video streaming or large downloads/uploads. Visit legal.HughesNet.com for network management details.
That is on several order pages for Gen5...
Gen5 Fair Access Policy states the speed can reach as low as 1Mbps or under, there is no hard-line minimum, but seems they will try to get 1Mbps as standard.
It is and in the past stated on legal.hughes.com, which is also a URL provided by sales agents before completing the sales order.
Just called to confirm what throttle speed would be. I spoke with a rep that had no idea whatsoever what he was talking about. I cancelled the upgrade due to customer reps not being knowledgeable about what they are trying to sell.
Just updating this for anyone wanting an official answer. I called and ordered my gen 5 today and after they transfered me to someone who knew the answer I was able to learn that approximately half your maximum speed, or 12.5 Mbps, is the max speed you could get once out of data depending on bandwidth availiable. I doubt I'll actually get this speed, but considering how slow gen 4 was, even the approximate 1 Mbps minimum they list is vastly faster.
After over 30 minutes on the phone with rep, I finally spoke with a supervisor that informed me that throttled speed would be UP TO 3 Mbps. He stated it could drop well below 1 Mbps and actually become unuseable after being throttled.