Which is faster wireless router or wired internet

Fairly obviously, a wired internet connection will be faster than a wireless connection, but by how much? Is it that much of a detriment to be running on a wireless network?
The speed for wired local area networks (LAN) is generally around 100 megabits per second (Mbit/s). The specification for wireless networks is 802.11b and 802.11g and while 802.11b operates in the 2.4 GHz band it has a maximum data rate of 11 Mbit/s. However, 802.11g also works in the 2.4 GHz band it has a maximum data rate of 54 Mbit/s but you will only realistically get around 20 Mbit/s from a 802.11g.
But really all comes down o your internet service provider connection speed. Most speeds are typically between 2 Mbit/s and 20 Mbit/s so using a 802.11g wireless router the difference would be unnoticeable against a wired router as the 802.11g can reach speeds of around 20 Mbit/s. This is assuming there is no interference with other wireless devices or other users using the wireless at the same time.
So for usual, general day-to-day browsing, there will be little difference between a wireless router and wired router and it is ultimately dictated by your ISP’s connection speed. However there is once instance where a wired connection will win hands down: Using a wired router to copy files is much quicker than a wireless router. A wired router can get speeds up to 100 Mbit/s which is almost 5 times quicker than a wireless router. Typically a 12Gb file would take as long as 150-160 mins by wireless, whereas it would only take around 35-25 mins by hardwire.