Vivek. Share your feelings -exit polls do not have much of a track record. They usually have a bias to the ruling party. That is the reason why all exit polls, including NDTV & AAJ TAK went wrong in the 2004 Lok Sabha polls. Right through the 5 phases., they projected BJP winners. At that time BJP chamchas used to quote these exit polls to score brownie points. In the UP elections, opinion polls right though gave the lead to the BSP but could not fathom the final magnitude of the BSP win. This because projecting voting trends is one thing and projecting seats is another. BSP picked up seats with small margins - 100-500 vote leads and magnified their seat lead. This was true of the 2004 Lok Sabha elections. The lesson we can draw is that what is significant is the momentum - in Gujurat all polls shows the momentum is against the BJP and for the Congress. If the past is an indicator, rather than 37 seats projected by NDTV, don't be surprised if the Congress ends up as high as 50 seats.
