Yes, but what I've noticed is that, when someone posts a car under the wrong category, someone else will notify them of the mistake, and the poster will usually change it to the correct one. For example, Christian posted what he thought was a Rolls Royce Corniche, but was alerted that he had actually spotted a
Silver Seraph, and was more than willing to change it.
I definitely think that some cars - especially very limited edition variants of otherwise non-featured cars, such as the R8 GT and Viper ACR - should get their own category. They aren't spotted as frequently as the regular model, and usually don't get as much attention unless the spot does happen to get featured. I'm not saying that we need separate categories for every single model ever made (how many different Gallardo's has Lambo sprung on us?), but those that are markedly different or much more exclusive need separate categories.
I'm sure I could think of more, but off the top of my head I would like to see the following added to ES:
Aston Martin V12 Vantage (leave the regular Vantage category for all the V8 models)
Audi R8 GT
Dodge Viper ACR
Ferrari F360 Challenge Stradale
Ferrari F430 Scuderia
Ferrari 458 Speciale
Mercedes SLS AMG Black Series