Wireless Carrier Broadband Bottle Neck

Some time ago I worked for Verizon Wireless and back then before the roll out of EVDO I worked as a Data Solution Manager selling mobile data services. Back then I noticed that eventually there would be a capacity problem at cell sites that had high traffic or areas where more mobile data users are trying to use the wireless data network for internet access. It wasn't really a problem when a 40k to 120K connection is all that is avaiable. Now consumers are expecting WiFi type of wireless access with 300K to 1 megabyte of connectivity. A recent online article All-you-can-eat 3G may not last explored the capacity concerns that wireless carrier like Verizon Wireless. On average I believe most cell sites have a single T-1 line, those creating a bottle neck. This would only be a problem at base station with high traffic. If a carrier was to provide what they are advertising true broadband connectivity, a T-1 back haul would not be enough bandwidth. This is where WiMAX would fit nicely. As mentioned in the article above, Sprint seems to be the only wireless carrier of is making efforts to accommodate and giving what mobile professional and wireless consumers are asking for.