Datapoint Australian English/As what / than what in comparative clauses

Variety: Australian English
Feature: As what / than what in comparative clauses
Value: B - feature is neither pervasive nor extremely rare
Informants: Peter Collins and Pam Peters

Examples

Example 3669:
it just tended to kick the hail off a bit more than what we'd expected

Source: Peters 2004-2006: COMe4:P1