I found this document for some additional info about fuzes:
http://www.ordnance.org/fuzes.htm
or
http://www.lexpev.nl/downloads/bombfuzedata1945.pdf
there one can see that with 1 or 2 exceptions all fuzes needed at least 1.9 sec. or at least 300ft air-travel to arm.
Those exceptions are delayed bombs.
The overwhelming majority needed MORE than 2 sec and usually 850 - 1100 ft. air-travel!!!