The change log shows that the reload time for the M4/76mm was increased. However, I appears most of the tanks felt some sort of reload increase.
Below is a list of new approximate reload times (recorded manually):
Panzer IV: 6 sec (was 4.3)
Panther: 6 sec (unchanged)
Tiger: 7 sec (up from 6.2)
T34/76: 9.1 sec (up from 8.2)
T34/85: 7.6 sec (up from 6.8)
Firefly: 8.2 sec (up from 7)
M4/76: 5.5 sec (up from 3.6 and logged)
M4/75: 4.2 sec (up from 3.6)
M8: 2.5 sec (unchanged, I think)
LVT-4: 4.2 sec (up from 3.6)
M3/75: 4.2 (new, but should be same as M4/75 and LVT, imo)
Times are approximate, they were timed manually and averaged. I can only do so much much w a timer on a cell phone.