It took me 2 years to get in, first year I heard nothing back. Second year I went to one of the roadshows, there they had a sign in sheet, where you register your contact details. Then a couple of days after the roadshow, I was e-mailed by one of the organiser pilots, who then fast tracked the application. About a month later interview invitation with a months notice, followed by another month till good news, 6 weeks till approval, then 4 months notice of start (at my request).
Here is a link to the road show season which starts in under three weeks. Good luck!!
Qatar Airways Flight Deck Crew Roadshow 2013