Blame AT&T and blame Google.
The real issue here is cable vs mobile. Apple has been clever enough to force AT&T into a flat-rate program where there is no reward whatsoever for AT&T to speed up its lines. In Europe (where I live), users are charged by GB so the cellphone groups are actually putting pressure in users to use more data.
Google is seeing YouTube growth in the mobile "trend" threatened and wants to speed up things. They will even go to the extent of paying ISP's to do it.
Like fixed phones (who uses them anymore?) in the near future so will mobile net access dominate. The big players will then have established themselves in such a way that there is no way a "youtube"-like startup will be able to compete as it's site will be excruciatingly slow.
This is an establishment-play by Google. A greedy play by the ISP's. A power-need play by the Government. And a suck-it-up-play for the rest of us.