That might be OK, as long as the target is above 3.55 Volts i.e. the cells are over 90% charged.

It would still take a while, a) because of the voltage drop acrioss the cell at any significant currents, but mainly because b) the cell voltage seems to exhibit a considerable amount of hysteresis, particularly at higher currents. In other words, after a change in state-of-charge, it takes a while for the cell voltage to settle to its true value.