I hate this tool, every 5 seconds he's posting some BS "What will...What if..How come..." question. If you took the time to search your self, you'll see 8 BAZILLION people have asked questions similar to these. Ironically enough, you're a student, HELLO RESEARCH!!!!
BTW for those who ARE going to read this, 15.1-15.2 is AVERAGE for both a GS-T GSX.
Rob