From a legal perspective the US may be safer than other places if the US is the one seeking your data. The US doesn't need legal process to authorize digging into your foreign server.
From a practical perspective, I'm not sure any servers are safe anywhere...depending on who may want your data.
I guess you mean assuming your data is stored somewhere in the clear (and whole).
I'm surprised there isn't a lot more attention to encrypted, distributed, erasure-encoded stores.