So i timed it...
Three consecutive times, no PIN (screen), CF card in place,
down and up to "Last Read" screen, hand-stopped:
2.9.1 down: (17,44 / 18,49 / 18,04) ~ 17,99 [s]
2.9.5 down: (14,91 / 15,25 / 15,61) ~ 15,25 [s]
2.9.1 up: (44,24 / 45,13 / 44,26) ~ 44,54 [s]
2.9.5 up: (44,09 / 44,05 / 44,89) ~ 44,34 [s]
Go figure...
Dirk