I think the wireless speeds would depend on your router and wireless clients. I do not have gigabit fiber but you can review the speeds of other users on the ISP on ookla.com and dslreports.com. FWIW, if you have a router capable of 40mhz wide wireless N or A and you have clients that match that you may get close to 300Mbit, but in my experience you'll need to be pretty close and not have too many wireless clients. In my experience you'll be lucky to get 300Mbit no matter what the hardware, let alone ISP. Your operating system may say you're connected at that speed but you'll be hard pressed to get it.