This is basically a default 3, because I felt many of this book's subleties and observations were inaccessible to me, and not meant for me, and that therefore I am not well positioned to judge it. The Temple-Goers is a very detailed exploration of the interplay of class and caste in contemporary India, and while the dynamics of class, new money and old, poverty and mobility, are universal enough, the Temple-Goers explores several uniquely Indian phenomena-- including the important role of caste, which is unrelated to class (the central figure of Aakash is poor and uneducated yet Brahmin, and thus in some sense superior to the extremely wealthy families that employ him), language divisions (much is made in the book of Hindi-speakers versus English-speakers, and also of the role of Urdu -- to a non-Indian, it is not easy to decode the issues arising from the ability and inability of characters to use these various languages), and the role or absence of religion (one divide, mirroring rich and poor, but not completely, is between the temple-goers, the adherents to traditional Indian values and the "green card folk", who are Americanized or Anglicized in their distance from religion).
All this is a lot for a young writer to chew on, and I felt that at times the book was static, opaque or slow, but I also understood that there was a lot being addressed. I felt though that Taseer's conversation was Indian to Indian -- he wasn't trying to help me get "caste" and, frankly, I don't, and I missed a lot of the book's allusions, religious symbolism and geographical hints. For example, the societal structure is represented physically for Taseer in Delhi's streets and neighborhoods -- but the coding (what it means that a person lives in Lutyens' Delhi...or the "old city") is not readily available to an outsider.
On an emotional level, the main plot line, which is about the narrator's desire for and infatuation with Aakash, his handsome, Brahmin, but lower class and uneducated, physical trainer, is interesting but slow at times. The most compelling emotional content in the book is the narrator's (named, like the author, Aatish) strong but repressed homosexual feeling -- one of the many phenomena of modern India that we learn about in the book is that gay culture is prevalent among the green card set, but violent prejudice is still strong in traditional society. But while the book lavishes attention on erotic descriptions of Aakash's lips and abs and nipples (and includes one fairly shocking and graphic scene in which Aakash has sex with a prostitute while embracing Aatish), the narrator remains resolutely un-self-aware throughout the book, making the book somewhat frustrating from a plot development perspective.
So, overall, an intriguing but, to an outsider, somewhat frustrating read.