How the hell can the Blue Jays suck so bad last season and then play so good this season?

I considered the Blue Jays to be a classic Toronto team, playing for Tv contracts and not for championships. When they made all those moves last year (including Barret-zeto) I thought they were just trying to regain fanbase (like the oilers in hockey), but this year they just seem unbeatable so far, except Rios seems to be the only Blue Jay not exceeding expectations….. Is this just a good start or a dud? and do you think they have what it takes?