Uptalking for Affirmation is Spreading

When we seek affirmation we have our spoken sentences higher in pitch toward their conclusion.  We experimented with the idea for analyzing 800 line calls. In the BBC:  Some indication exists that the practice is drifting towards being more prevalent among both genders.   From a recent paper at a meeting of the Acoustical Society of America.  An organization I had not heard of. Will this require some adjustment of speech emotion analysis systems?

Update:  U Penn's Language lab chimes in analytically in this subject.  regarding study methodology and its conclusions.  Essentially says that the logic for proving this is weak.  Language Lab is always interesting on things language and communications related.