FaceTime date lasted 9 hours… good sign?

This guy and I met on a dating site. We text on and off and decided to FaceTime as I was in my hometown for a week. We FaceTimed for 8 hours (7pm-4am). Time flew by for the both of us, we even talked about it when we were texting the next day. We have FaceTimed again since that! Is this a good sign?
FaceTime date lasted 9 hours… good sign?
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