I obviously didn't apply to any of the schools you asked about, but my school is pretty new too. (Our first class will be graduating this year, and I'm in the third class.) It pretty much comes down to how risk-averse you are. If you're a state resident of Florida or Texas, it makes sense to apply to all of your state schools, even the ones that are new. You can always withdraw later if you decide that you're not comfortable with taking the risk of attending a new school. Having attended a new school, I don't think it's as big of a deal as it might seem to a premed. Just my opinion.