I haven't tried 'Lilac Wonder' yet. But the various forms and hybrids of T clusiana have done well here in south Louisiana. Some of the white and red ones ('Lady Jane' or 'Peppermint Stick') are blooming now. The yellow forms ( sold as T chyrsantha I believe) tend to bloom a month or so later for me. There are others that don't need chilling as well but I haven't tried them yet. Mine don't spread as vigorously as others have reported, but they aren't dwindling down either. They were a small investment and for this area make much more since than throw away bulbs of Dutch hybrids that just rarely look good in local gardens anyway.
From what I can tell the non chilling types are unrated and very underused in this area and perhaps many other places.
Tim Chapman