Personally, I dont see the big deal about the top speed claims anyway. The only class of racing that gets to those kinds of speeds is 1:8 circuit racing and neither the CEN or the Fusion are eligible for that class. That makes this 'race to 100mph' claim a complete waste of time and only useful as a marketing gimic.
If the Schumacher has been clocked at 88mph stock, then I am sure CEN will adjust their adverts accordingly, I just dont see that its worth making a big deal over.