The default timestamp format in JMeter csv logs is given in a Unix style format.
For some (including my colleagues and I), this simply introduces an unnecessary delay to the analysis process of performance tests. Granted it is pretty straightforward converting the format from Unix time to human time with the help of the Excel ‘HOUR’ function, but when you are analysing many tests, it becomes slightly repetitive and cumbersome when you have an option in JMeter to switch to a more human readable format 🙂