The company said Wednesday it will refresh its portfolio of services next month, introducing four new speed tiers. The most eye-catching will be the top plan, with 300Mbps (bits per second) downstream and 65Mbps upstream. With that grade of service, subscribers will be able to download a two-hour high-definition movie in 2.2 minutes and upload five minutes of HD home video in 31 seconds, according to Verizon. The fastest FiOS service now is 150Mbps downstream and 35Mbps upstream, with TV and voice, for $199.99 per month.

When it comes to national-scale broadband services, the 300Mbps service won't have any competition on the speed front. The large U.S. cable operators don't offer any services faster than about 100Mbps, and rival carrier AT&T, which doesn't build fiber all the way to homes with its competing U-Verse service, tops out at 24Mbps.

However, even the faster FiOS won't bring the U.S. to the forefront of global broadband. A survey of fiber service providers released last September by the Organization for Economic Development (OECD) showed operators offering 1Gbps speeds in Slovenia, Japan, Turkey and Sweden, and one in Norway advertising 400Mbps service.

Localized projects in the U.S. also are hitting the 1Gbps mark, or will when they go live. The most closely watched example is in the twin cities of Kansas City, Missouri, and Kansas City, Kansas. The company said last month that it had laid 100 miles of fiber there, though it hasn't given a firm commercial launch date or pricing for its service. Google's experimental fiber network in a residential area at Stanford University is already live with 1Gbps service.

Last week, a coalition of universities said it had to build gigabit-speed fiber networks in six university communities. Small ISPs, including Sonic.net in California and , also have built local gigabit networks.