Typically, big queues outside polling booths early on election day don't bode well for the incumbent. It usually means the voters want change, as was the case in 2007 and 2013, the last two occasions in which a government was removed from office.
With the advent of pre-poll voting, the modern equivalent of the big queues may be people voting early in large numbers. That has certainly been the case this time. The polls opened on Monday and by Thursday, a record 510,000 of the 16 million enrolled voters had cast a ballot.