9 out of 10 cities featured here (except for the suprise Bardhman) are the among the 10 largest cities of India. If they had included Kanpur(9th largest) instead of Bardhman, this list had all 10 largest cities as fastest growing cities.
this means rest of of the nation is not growing as fast as the big cities growing. This also means that only big cities can grow fast, not the small cities. So, there would be mass scale migration from small cities and villages to these cities leaving rest of the country underdeveloped. This paints a very dangerous picture of India's future.
There is no authenticity of this list and data. Could be handiwork of builders who might have invested in land in these cities and looking for good rates of the properties.