UPDATE: This CSV EXPORT feature is now implemented, see below for video demo.
It's a really good question actually.
The answer right now is ... not really
The data is stored in binary format. I would need to write a program that exports it according to given date parameters (start end).
Maybe a utility page that allows entering 2 dates and starts a CSV file download?
It could also display the START and END of the stored data, and # of points.