Just got my shiny new Note 10.1 wifi version. The supplied charger surprised me with the 0.35A rating stamped on it. I'd been told tablets don't charge by microUSB because their battery needed more than the typical 1A charge rate on many smartphones. So, how long should I expect this first charge to take? Looks to have been about half charged when I started. My other question to Samsung - if this can charge at such a low rate, what's with the proprietary charge connector? Why not use the typical microUSB?