Inverness had scored in their previous 25 games this season and last failed to find the net in a draw against Dunfermline in May, which secured their SPL status.
That prompted Butcher to claim on the eve of the game that a goalless draw would send "seismic shock waves" across the Clydesdale Bank Premier League, but he was happy to see his side stay in second place and stretch their unbeaten run to nine matches.
Butcher said: "It's a good point for us really.
"Nil-nil is a thing we don't do very often.
"I said there would be a seismic shock if it happened - I'm never going to say that again.
"It keeps us in second and after 26 matches there are only two teams that have beaten us - Motherwell twice. That's incredible in itself.
"If you had said that in July I would have said 'no chance'.
"This is all beyond our wildest dreams.
"I felt we showed a bit of a different side - grit and determination and battling qualities because St Johnstone were well up for the game and really had a good go at us."