According to a table of seat results at Wikipedia,* the “victory” for the PPP in 2008 was a bit worse a showing–in seats–than it had in 1988 and 1993, the two elections that resulted in Benazir Bhutto’s premierships. Out of 207 total seats in these elections, her party won 93 in 1988 and 89 in 1993. That’s 45% and 43% of seats, respectively, compared to 32% this time.
Sharif’s party won 137 in 1997,** the election that led to his premiership, which was interrupted by Musharraf’s coup in 1999.
* Never my favorite source, but will have to do for now.
** Compared to 68 of 272 now.