You have turbo mode no problem patt,the issue is with "some" tk61 lights on the instant turbo where you hold power from off,and turbo comes on till you release.However some you get a few seconds up to 10 seconds.I am not one for holding buttons so if you like turbo just power off in turbo,then press once and instant turbo with no button holding.
Way around if your light is effected is to hold power,then hold mode button,release power keeping mode button pressed instead,not perfect,not saying right just an almost instant turbo if required
IF and its BIG IF yours is effected with instant turbo,it bothers you,then return it...........simple as that but its guess right now if effected or not.
I am hoping the communication in Fenix is good,the issue/glitch has been addressed for any further production lights.However there will be some already bought and stocked by sellers that could have glitch/fault.
See when it arrives patt