Before teams grow in alignment and velocity, they are dominated by the tyrany of personalities. If the chemistry of personalities is good, the team can do well, as long as this chemistry continues. If the chemistry is bad, the team will suffer and struggle in slowness.
One of the classic indicators of slow team cultures is that people blame the personalities of team members and/or leaders for their slowness and all the karmic characteristics of slowness like fragmentation, disengagement and team learning disability.
The more nimble teams become, the less relevant personality differences become as points of blame. The more everyone engages each person's differences in goodness.