Tamils and Telugus are most to work for ITs from Silicon Valley to Bengalore, Chennai, Hyderabad etc... Someway around 30, 30 percentages. I too hold the same statistics and confirm the same.
But Bangalore accounts nearly 30% of SW export, Mum around 20%, Chennai and NCR more than 15% each. Ok! But IT dont perfer banglore for anything speical but its locality in India and not abt being in KTA.