Carlo - bluetooth support for Sync is fine - it's usually the cell phone provider that's not providing the proper profile support. E.g. my 2008 Edge supported text messages to speech way back in 2008 with a Motorola RAZR phone but other phones did not work and still don't work today. That tells me the problem is in the phone not sync.
If you think about it - what other bluetooth devices read text messages? Not many, so the cell phone providers just haven't made it a priority.