If you use Comcast Xfinity internet, your FaceTime calls might be about to get better. Instead of bumping up the amount of data that your internet connection can send or receive at one time (usually called bandwidth or throughput), a new upgrade is coming to reduce the amount of time it takes for each packet of information to make the trip. Comcast is officially starting to roll out the “pioneering new, ultra-low lag connectivity experience” to cities including Atlanta, Chicago, Colorado Springs...