To answer this would vary and be dependent on placement of the AP, download and upload baselines from a customer's ISP, number of clients utilizing the wireless network. Throughput is capped by the ISP, as well as the devices that are upstream to the APs. Throughput should be considered "aggregate throughput". Wireless is half-duplex, so the actual expected throughput is usually 50% or less of the data rate.
Again, the answer to this would vary on the environment. I hope this helps.
The point of this question is to mainly understand the max throughput of the access point because I could not find any documentation providing this information. I don't want to purchase and then find out the max output is 250Mbps.
Based off your description, if my ISP speed is 1 Gigabit up and down, and for WIFI IF ALL CONDITIONS ARE PERFECT(placement, no walls, etc..) that means the access point is capable of providing Wifi speeds close to 500Mbps up and down?