As to the Drake "pop" comment, it's geared towards the aspect of being a quick rise to the top based on the cult following he has by those who are outside the die-hard fan base that is what carried artists like JayZ and Lil' Wayne from the Rap culture into the mainstream. This cult following was not adapted by those who are loyalist to Rap music, but rather tend to be those who are more geared towards listening to "Real Slim Shady" in the club rather than "Fight Music" from D-12, and base their opinions on rap music from small samples learned by what plays on the radio. The "Underground rap" is where you tend to hear people who are actually story telling rather than talking about "Blunts, Bitches, and Benz" so that where I build my basis from. As for Hieroglyphics, it's not that they are the best lyricists in the world, it's that they are a unique group that meshes very well together in relation to each member. Think Original Wu Tang and how they played off each others strengths.