A great many individuals with autism are also intellectually disabled.   Those with Asperger's syndrome, in contrast, must by definition have suffered no cognitive delay during their first 3 years of life. 2 This means that they will usually have at least a “normal” IQ. In some cases, their IQ may be very high, even in the genius range. There are, however, different kinds of smarts.
Turnips are as dumb as they sound.