I've noted a similar experience. I had plenty of time in T3 by checking in early and busing straight over (there seemed to be regular buses and nothing at all to do in T1). If you arrive early, check in promptly and clear security straight away, you should have plenty of time to marvel at the horrendous Duty Free prices in T3
Originally Posted by
lexande
I've only flown this way once, but the bus definitely makes several trips as passengers take widely varying amounts of time to make it through security. Once I'd cleared security, most of the wait was in T3; I talked to someone else who'd gotten a later bus and only barely made the flight.