Assuming you stay with .5% of your bankroll or less, and given no concern for heat, is there any reason to bet x (whatever x is, as dictated by the system you are using) assuming you are in a positive expectation (true count 1.5 or >?). Is there really any reason to ramp your bet slowly, etc.? It seems to me that when you are in a +EV situation you want to get as much money in as is reasonably possible.