Question about broadband internet

[vladittude0583]

Hey guys, I have several questions that hopefully some of you can answer.

1)
My current internet (Clearwire) service allows for 1.5Mbps max download speed and they are offering me a special to upgrade to 2.0Mbps for the same price that I am currently paying for the 1.5Mbps. However, I must agree to extend my contract for another two years. Anyhow, is 0.5Mbps really that much of a significance?

2)
I am looking to switch from Clearwire to AT&T DSL and would like to go for their "Extreme" DSL editions which can either be 3.0Mbps or 6.0Mbps download speeds depending on how much I want to pay. Anyways, when I did AT&T's "availability" in my area search engine, the fastest they would allow at my residential address that I have been living at for the last 10 years is only 1.5Mbps. What bothers me is that when we used to have Bellsouth DSL (before AT&T merger), we had the extreme speeds at 3.0Mbps and this was still in the same residential address. Why is it now that its AT&T, I can only have the Ultra speeds at 1.5Mbps and not the "Extreme?" Is AT&T changing the wirings or something since the merger? Could someone verify this? Could it be because our "home line" is still practically brand new - it was opened about two months ago.

3)
Back to my Clearwire situation, the rep told me that Clearwire will soon be switching over to WiMax Technology for their internet services - does anyone know if WiMax is better than DSL or Cable?