Be warned, you may think its a good thing but they'll be charging more after the 'promotional period' is expired, unless user asks to remain on 1Mbps. Just came across the following on PTCL website:
"PTCL has upgraded data rate of 1 Mbps customers to 2 Mbps without any additional charges till 30th June 2011.
PTCL 1 Mbps Broadband customers can now enjoy 2 Mbps data rate at the price of 1 Mbps data rate (Rs.1,199 per month) till 30th June 2011. After the expiry of the promotional period, normal tariff of 2Mbps “Rs. 1,499” will be applicable. This promotion will not be applicable on Broadband student package."
Hope they get a danda from PTA about this. They tried to do the same for their phone packages long back.