The slides (specially #5/9/11) gives a very good info for people to understand the significance.
The size and extent of the habitable zone of Kepler-452
is nearly the same as that of the sun, but is slightly bigger because
Kepler-452 is somewhat older, bigger and brighter. The size of the orbit of
Kepler-452b is nearly the same as that of the Earth at 1.05 AU. Kepler-452b
orbits its star once every 385 days.
And slides here (currently on Figure 10) http://www.nasa.gov/keplerbriefing0723
EDIT booooo - audio stream has gone down
EDIT yay!