Same for everything, nothing is as fast as stated, just a quirk of marketing I guess.
Wireless networks are no exceptions.
I can sense that the wireless networking boom will come in a few short months. Even looking at modern colleges, they are setting up massive 802.11b or other wireless networks to cover their entire campus and equipping freshmen PC Cards for their laptops so they can literally have the Internet at their fingertips. There is a lot of money to be made through wireless Internet because of the wire variety of uses it has in both commercial and personal applications. In the business world, it's ideal for connecting isolated and hard to wire areas of the office and also for the constant, everywhere, Internet access. For the home it's the same, no one wants unsightly CAT-5 cable running around the house or apartment and a wireless connection is a great way to get rid of it.