70-30 on the episcopal, clerical, or lay level? Is your guess for North AMerica or world wide?
Good question. I didn't think along specific lines.
By best guess would be thus:
Bishops: 3-1 in favor of return.
Priests: 60-40 in favor.
Laity: 70-30 in favor.
Worldwide: 70-30
North America: 50-50
Europe & All other places: 90-10