Unfortunately no one is going to be able to give you the quantitative info you're probably looking for... Even if they're using a system just like yours it'll depend whats running on it, what your connection specifics are, and most of all what things you would notice that other might not and vice-versa.
The answer is easy though, its free to download and check out yourself, just fire up the download before work and when you get back, give it a shot.
On the plus side, usually having lower than the recommended CPU isnt what causes flat out failures to run, it'll just limp along too slowly in most cases. Furthermore there are lots of config settings that I saw (I only recently put it back on my computer after years off) so you have the ability to cut the settings down pretty low, that could help you out.
Good Luck