Already many smaller providers offer standalone ADSL2+ plans that have not been captured by the Index.

IIA CEO Peter Coroneos said the index allows the organization to monitor Internet targets for broadband, and encourage the widespread deployment of higher speed, better value plans.

Spectrum partner, Justin Jameson, said the consultancy will track the broadband plans on offer every quarter going forward.

"Already, the index has shown that usage impacts the cost of broadband to customers more than speed," he said.

"This suggests that many customers could afford to upgrade to higher speed services if available."