Speed is relative.
I have a new Mac Mini with USB C SD card reader and SD external HD. Reading JPEGs is lightening fast, ARW files is tornado fast. CP1, has been abandoned, but for general performance reasons, I didn't try read write comparisons.
The USB C technology is the key. I can't say the same for USB 2 or 3 and on my old 2011 iMac, ARW files took a long time.