On the EC120 (similar hyd system to 350) a few years ago EC changed the check-list so that the ACCU and manual control Hyd OFF checks are done at ground idle prior to opening the 'throttle' to flight idle. Previously they were done as per the general interpretation of the current AS350 checks, ie nominal flight NR.
Bell, on the other hand, have standardised the checks across a number of types: HYD(s) Off (in turn) and check no unacceptable kicks at ground idle, plus cross-system interlock checks; then check of acceptable manual control forces at 100% NR.
If you're going to get a nasty surprise it's better at ground idle than flight idle, but checking the acceptablility of control forces in manual at flight NR is not bad idea.
(Sp edit)