As I've been saying we'd be lucky if we only go back to the 70's.
The Guardian, last defender of warmth, has nice world snow pictures.
"Such quantities of snow above 800m altitude only happen once every 30 to 100 years," said Alexander Radlherr from Austria's Central Institution for Meteorology and Geodynamics.
So, global warming is dead, and we are only in the minor ice age. The big cycle of 600 years, I've decided to call the major ice age. Major ice advance is another thing entirely.
When they can finally find the Alps glaciers, they'll find they are advancing. :)