dont have a prime yet, hopefully tomorrow ill pick it up, but heavy user of gv. I have had issues of non responsiveness, usually due to my wifi because of a week signal, when that happens, i turn off my wifi and use hsdpa+ to make sure its just the wifi. If it persists then i know its the gv servers. There are so many variables its just tough to know!! I would reassure you its not your tfp!
With receiving messages thats even more of a problem!!! Then you never know if its gv or its the carrier your getting the message from.
If youre even more unlucky you probably have a roommate who bit torrents almost a terabyte a month worth of crap and doesnt know how to tweak his settings!