Most of the US educated academicians who teach in India are normally at the IITs (engineering schools) and IIMs (management schools). The teaching styles of professors at these schools are identical to US schools, however their effectiveness is debatable. To be fair to them, they are usually ham-strung by institution-wide regulations such as a guideline that 80% of the grade be determined by a mid-term and a final (I know this is the case at IIT Kharagpur, not sure about the others). They are not as productive research wise because while the graduate students in the US are competent and (usually) smarter than undergraduates, the reverse is true at most Indian institutes (the smart guys go abroad). There is no room for mentoring because undergraduates have a heavy courseload (5-6 technical courses per semester) and the professors have a lot of administrative work apart from teaching.