Totally. But because of the introverted/extroverted thing, an SLE is more likely to naturally want to respond to his environment without going through an interior filter, whereas an LSI is more likely to naturally want to check his internal filter before responding to his environment. The actual resultant impulse control has to do with many factors beside type, and if you plotted impulse control against type, there would be plenty of LSIs with worse impulse control than plenty of SLEs.