Basically what I have seen as follows.
Wifi can suck hard!! I have a Unifi setup and until i forced everything to 5Ghz, my iphone etc.. were rarely going over 120Mb, then once I changed that I can see they can hit 200/250 no problem using the speedtest app.
When testing against wired connection, I can easily get over 240/280Mb, I would say 80% of the day. to get over 300/315 it has to be either during the day, or late in the evening.
Note: The kids aren't at home during those hours and telling them and the wife to stop stream so I can do my test's just get's ignored
I can say though when no one is around at home, you can easily get to the 300Mb, now whether it can be pushed to 330Mb is hard to say because of overheads etc.. plus I think I need to upgrade my PFSense box, which I will be doing in the next few months (As soon as PFsense fully supports the atom C3000).