You're possibly confused.
Where did I say we accelerate before 1,500ft?
OK, once more with feeling,
You accelerate AT 1,500ft - to Green Dot (Clean up).
Thats their SOP.
The turn comes later at CNS....you go straight out for 11 miles!
There's a limit on the turn speed. Lets call it 200kts (its a fixed MAX speed).
Your Green Dot is 205kts (because of your weight on the day).
Now what?