I could be wrong, but I believe the installation techs are set up a little differently than the repair techs, and there are most likely a lot more of them. Hopefully the case escalation will have a result.
With that said, even when the problem is figured out, I wouldn't expect to get 1Mbps upload on a regular basis. You may hit that sometimes, and sometimes even higher, but it's not guaranteed.
"Depend" is a tricky word. The speed's not guaranteed, and although you MAY very well get a speed of at least 1MB, it may not always be that. I wouldn't bet the house on it being at least that speed all of the time. That's one of the inherent problems not only with satellite internet, but any internet that can be quite affected by the number of people online at any given time. Then throw weather into the mix, and it's even less likely to always be at a certain speed.
The official reps may be able to give you an idea of what the average upload speed is of a certain package, and maybe even regarding your gateway, but there's no way to guarantee it, nor guarantee that the speed you have one hour will be the same the next. There are just too many variables in the mix with this type of internet. Not only that, but don't forget the high latency involved, as well. Unfortunately there's really no definite answer. I wish there was, but for me, if it has to have a certain speed for it to work ( I don't have a phone like that) and it's something that I need to work 100% of the time, I'd be a little leery. I like Hughesnet, but that's just me being honest. It wouldn't be something that I could rely on to work 100% of the time. Sorry.
I know that a lot of people have Hughesnet phone service. I don't. I'm still old school and still have a landline. I do have a cell phone, but have only used it for a total of 16 minutes in the last 12 months. I've sent two texts in my entire life. LOL. I can't attest to the reliability of their phone service, as the only thing you really ever see regarding it on here is when someone is having a problem, but then again, for every person that has a problem there could be 100 that don't and you never hear from them because of it. Not that many people that are happy or even satisfied with a product come onto message boards to express that, just the people that have a problem.
Perhaps someone with a higher package can give you some more informed answers, and maybe the reps will be able to when they are back on Tuesday (they're off on Monday 7/4).
The 12MB manual test size Chris mentioned is for the download test. When you are performing the upload test, make sure to use the 2MB manual size.