HPTuners has stated that they now use the manufacturer-specified timing when writing calibrations - which is obviously slower than the writing method used in 2.24. However, since I'm not aware of people having issues with the write speed in 2.24, it would be nice to at least have an option ("fast write" or "mfg write") - or something along those lines...
With 2.24, I can write my ECM and TCM in about 1 minute! :-)