Fl studio is faster to load because it does not load all the plugiins instantly like ableton.cubase and nuendo. It goes to a standard template. But when you go to load a beat or track it will be a minute or two.
When you load cubase it loads everything at the initiation. But when you finaly in the daw it loads a track in a sec because all the plugs are already loaded.
It depends on what plugs you have and how many you have thats why my nuendo will take about 1-2 minutes from a cold computer boot. And my cpu is a beast.