It really depends on distance, all Internet connections depends on the distance, the farther the connections are the slower speed it becomes.
Once you study and understand the protocol of the Internet handshake, does not matter how fast your equipments are, the lowest speed connection at one point will always affect the whole connection regardless.
For example, the cable modem may handle 10MBPS network speed, and you got gigbit router meaning it can handle 1,000MBPS, yet the modem will force that router to lower the speed to 10MBPS. It is all about protocol handshake involved.
Sure you could get 54MBPS wireless router, yet you are stuck with the speed that offers from the modem.
There are two seperate factors that affects the overall speed.
First is the speed (Bytes per seconds), second is latency, both are not the same thing.
Latency happens when the packet isn't delivery properly, it can cause one of network device to "Hold" and wait for the packet to complete then deliver, that is what called latency. Wireless devices has higher latency rate because they need to filter the airwaves, too much airwaves out there that needs to filter, the more airwaves around, meaning more filtering work resulting increasing latency.
True wireless can be great if there isn't much wireless traffic around, but it can be disasterous if you live in apartment complex and everybody is using wireless, this will impact the latency and people will start notice problems appearing. Already happened to my friend who is wireless freak, he realize the problem, so again wireless has its limitation.
I have studied the protocol recently now it makes clearer sense to me.
Wireless won't be the future because transfer rates on wireless routers are slow. It is better to transfer large files computer to computer which is hard wired. I noticed internet is sort of slow and has slightly problems loading some web pages on a wireless router when I'm using wi-fi mode on my iMac.