I think part of the fun of 914's is how raw they are. Once you get all the individual car's eccentricities down its the same fun, but you feel like its all your secret on the good days when the car is working as intended.
The fact that they are dog slow is made up by the fact that your sitting on this little motor making a huge racket. Its the "I must be going fast, given how much noise i'm hearing" thing.