I stick by my statement. Let's take 802.11g, the 54 Mbps standard. Let's say you're connecting it to a 100 Mbps wired network. The 802.11g workgroup itself says net throughput will be around 19 Mbps. On my own wireless network, I measure 22 Mbps. Since my internet connection is currently 200 Mbps spec, 110 MBps actual, wireless is no good for me.
802.11n workgroup reckons typical 74 Mbps on a 300 Mbps network. That means the domestic backbone must be gigabit. Most people don't have that yet.
I agree that, in the UK, most people will not notice a problem surfing the internet. But elsewhere, 802.11g doesn't hack it.
Wireless is always slower. Let's put it another way. Imagine wireless came first. Suddenly, someone offers a hardware hack that costs less than $10, weighs less than 100g, increases your privacy and increases network speed threefold. That person would make a fortune: the cat5 cable.