cygwin copy problems usb 2.0

hi,

i've got usb 2.0, when i copy through TotalCommander the copy speed is quite high. when i copy through cygwin shell it seems that it is transmitting data only with usb 1.x speed.
very spooky, because i thought that cygwin is calling windows drivers/api so it should be indirectly supporting usb2.0 ?

thanks.