Follow-up: A fellow Yelper enlightened me on two items:
1. Purple rice may not taste different, but is considered healthier.
2. Adding water to a rice stone bowl is the traditional way to serve Korean rice.
So, I chose to update my review. I still chose a moderate 3/5 stars for the other reasons mentioned in my previous review. At the end of the day, there are lots of very fine alternatives for Korean restaurants on this stretch of Yonge street.