The respectable growth number is doing a ridiculous amount of lifting in this comment. For context, the GDP growth in the US has been above 5% year over year only a few select quarters in the last ten years [0], or alternatively only one year out of the last ten years if you measure by year [1]. It's a bit of a stretch to say that Greece needs to "just" beat what the US is doing, and then some.
And usually only when coming off a recession, when it's relatively easy to achieve high growth rates simply by putting people back to work. The last time the U.S. grew more than 5.5% YoY and it wasn't a recession recovery was 1978. More typical averages have been 2-3%.
It's almost unheard of for a developed economy to consistently grow at 5%+. To get those sort of growth rates you need robust productivity increases fueled by technology and innovation, and productivity increases have been hard to come by recently.
[0] https://tradingeconomics.com/united-states/gdp-growth-annual
[1] https://tradingeconomics.com/united-states/full-year-gdp-gro...