Testpanel, are you annoyed at the transmission from TWR or the fact that you think you have to change as soon as TWR tells you?
From my point of view as a TWR controller, I want to get rid of you (in the nicest possible way) as soon as possible, I don't care when you actually make the switch - I have seen you on the correct squawk, and have taken any separation issues into account when I instruct you to call DEP's. You will be limited in your climb to the SID stop level, and I know which way you are going. DEP's can see you and also know what you're doing.
If you wish to delay your call to the next frequency, that is up to you, or if you like I will get you to remind me to transfer you when it is convenient for you. As someone else has said, different SOP's for different airlines. One airline used to prefer the change at around 2000', others earlier, less than 1000', so we can't have a generic instruction to transfer acft at a specific level etc.