Telangana debate: have smaller states worked in India?

The Telangana announcement has triggered the inevitable. The recent bandh in Darjeeling was an example of how it's reigniting similar demands of separate states from across the country. The demands cut across party lines. The Bahujan Samaj Party leader Mayawati has said that the Centre should divide India's largest state Uttar Pradesh into four smaller ones. The Nationalist Congress Party's Praful Patel echoed the same sentiment for Vidarbha.