Tardive dyskinesia is extreeeeeeemely rare nowadays, it mosly occured with the older neuroleptics. All neuroleptics, even the newer ones, have that warning label- just in case. It's not uniqe for Risperdal- for example Zyprexa has it too.
Don't be afraid to try Risperdal, maybe it's the medication for you. If it's not, then you at least gave it a try... I hesitated trying Zyprexa, but now I've been on it for almost one year with a good result.
Edit: facial twitches is a side effect, I've got it too, but it's not tardive dyskinesia. TD is not a result of these twitches as it comes as a surprise, and it's much more severe.
Twitches go away when you stop taking the med, but TD- when you move your head, tounge, arms and chest with no control- is for life.