TalkTalk and BT were the worst offenders, offering users a speed estimate without prompting in fewer than half of cases.

BBC: BT trialist

"Speed is at the centre of a customer's decision to buy broadband, so the findings that only 59% of ISPs gave an unprompted speed estimate over the phone is disappointing, " he said.

BBC: BT trialist

The Fujita scale is used to estimate the wind speed of a tornado by the damage the tornado causes.

CNN: Tornadoes Fast Facts

Remarkably, this estimate is 40 to 60% higher than the 3.1 million ton reduction the California High Speed Rail Authority (CHSRA) originally claimed in 2008 for the entire plan, including extensions to Sacramento and San Diego.

FORBES: Cap & Tax: California's Recipe To Feed The Texas Economy