My answer is yes ... my laptop has hyperthreading available, and apparently turned ON by default. Its Quad Core i7 shows up as 8 "cores" when queried, since each physical core can process 2 execution threads at the same time.
Core speeds (MHz): 1: 1297 2: 1711 3: 1896 4: 1460 5: 1376 6: 1447 7: 1297 8: 1384
Is the option to turn off hyperthreading available because it conserves battery life on laptops that depend on their batteries? Mine is plugged into the A/C adapter 24/7, because I use it strictly at home, so I've never been tempted to find out how to turn it off. (I assume it's a UEFI option?)