Seizures connected with behavior issues?

Hi, I'm new here and still working with a preliminary diagnosis for my 6yo son. His neurologist says he's having complex partial seizures and we're scheduled for an EEG tomorrow, and an MRI at a future time pending clearance from the insurance co. No meds yet. My son has is extremely bright and verbal, and he's doing great academically in school. But his behavior can be really difficult. He has poor impulse control, has trouble keeping quiet, and can be rather oppositional (in a cheerful-but-very-annoying way...he never has tantrums and he's doesn't get angry easily). He does not seem to have ADD symptoms. He's been sent to the principal's office a couple of times, and he's only in Kindergarten! The thing that I find really chilling is that his K teacher said to me, "I find that the Ben I get in the morning is the Ben I'm going to have all day." as if to say some days he's in control, and some days he's not! I've observed this too -- it's as if some days he just can't keep himself together no matter what! I can tell you that some of his worst behaved days have also been days he's had seizures. I don't want to make excuses for his behavior, but before I bring it up with his neurologist, I'm wondering if anyone has any insight on whether a connection exists?