Really? When did Apple turn on a dime to bring out a refresh to a poorly received model?
The 2002 iMac G4 (the "sunflower") was discontinued in June 2005 without a replacement in place. It wasn't until the end of the year that Apple brought out a redesigned iMac. If they could have introduced a new iMac faster, they certainly would have -- today it's almost inconceivable that they didn't have a consumer desktop for sale during much of 2005.