DislikedIt depends on what you are asking. After the order reaches them then they execute it in 972 microseconds, but remember there's a lot of equipment and wire between you and the broker. How many hops does the order have to go through to reach it's destination, in some cases that could take more than a second or more, depending in internet traffic. I'm sure some of the brokers got better as the internet got better. The US doesn't have the best internet service in the world - far from it - it's run by the phone companies who are always complaining about...Ignored
Thats right if you have to send a market order the excecution speeds depends more on your internet connection than on your broker. If you have a Buy Limit Order already at your broker it should be filled in a few miliseconds no matter how lame your internet is.