Even though they are professionals the players are still nervous and a little tight to start the playoffs. Nash probably just getting into the swing of things throwing the puck at the net and getting his legs under him. It might sound stupid but some of these players just need some touches and maybe a full period to lose the nerves. Second period will tell.
100%.
The entire build up, and the amount of adrenaline leads to a shaky start like that. Both teams will be more settled in the second period.