There is massaging speed figures on a forum which isnt exactly unusual as alot of people do it and then there is claiming sprint speeds that are comparable to what the fastest riders in the world achieve on sprint finishes with lead out trains. It is faster than the speeds reached by the best sprinters in the world doing the kilo and comparable to what they can manage in a flying 200m. These speeds would be in a velodrome with a faster surface than road, skin suits, track bikes, aero helmets, aero wheels and no wind by guys that are specialist sprinters who put in very specific training to get to these speeds.
It is nothing personal - if Mark Cavendish, Tyler Farrar or Thor Hushovd were claiming to be able to match them in a solo sprint i'd be calling BS too!