Amazing hybrid feats are rarely BS (unless beyond the laws of physics). They are, however, often executed under specific circumstances (sometimes, very controlled and experimental conditions). A basic statement like, "I can accellerate at the 40 MPG bar" is certainly true under the right conditions, but not all conditions (flat road is assumed, for example). If I did that on my daily route I'd be crushed. Some can, and do, do it. Rest assured. What the cars are capabile of, and what we can pull off on a daily commute are sometimes two differnt things (but not always...).

Mine is typically a progression. I need the bar at 20 to get to 10-15 miles per hour, then progressively let off until 40, then I hold that until the desired speed. That is, if roads and traffic allow. :-)

*** Retired after 65,000 outstanding miles ***