The boeing software we use for our 737s has as standard setting improved climb speeds activated. Given enough runway (MUC 4000m for example) it will try to use all runway and increase thrust reduction for any given weight. Usual speed increase above the non-improved climb speed is around 35 to 40kts additional to a quite noticeable reduction in take-off thrust. Many of our crew do not like to use improved climb for many reasons, one of them of course the prospect of rotating within the last 500m at 175kts instead of halfway down the runway at 133 or so, another one is the much longer (around 60s instead of 30s) take off roll which makes life for our ATCO-friends difficult especially at busy airports. And it feels kinda weird to take off with only 75% N1 which will lead to a thrust increase at climb thrust reduction even for climb 2.