I admire Chetan not because he wrote three 'blockbuster' novels. It is not just because of his popularity I admire him.I admire him for making the MTV Generation, the Generation X, to want to read. The same way Narayan did years back. Narayan made a generation of youngsters want to read.
Yes, you can argue that IIT or Call Centre or Cricket is not literary material. That is the saddest thing about the Indian Literary Critics. They think only Magical Realism can be literature. They think something can be considered Indian Writing in English only if it has Colonialism as its background. May be they also thing only the absurd can be literature. But to me, literature is also what R K Narayan and Chetan Bhagath write- the simple everyday life. It is literature to me because it engages my mind, fires my imagination and makes me want to read more.
The same way R K Narayan wrote about middle class and lower class existence in Post-Independent India, Chetan writes about the middle class existence in Post-Globalization India. What ever their theme, both are writers who mesmerized the generation of readers they targeted. Both are writers who made their target audience want to read. True, both have a ready made readership - people who would surely read what they write. The fact that both of them could find out who that readership was, and write for them is what makes them both a class apart!
Images from Wikipedia and Sulekha.com