I just reviewed my Starwood account for stays since last July.

19 stays
4,473 points earned for hotel charges.
17,000 points earned for platinum amenity bonuses and stay bonuses and of those more points were for stay bonuses than platinum amenity.

Average of 895 points in bonuses per stay on top of 3 points/$1 in hotel charges.

Of course I am not including the 50,000 point bonus for 5 stays in Australia last July.

Actually, I earned 67,000 Starpoints in bonuses since July 2003 and 4,473 Starpoints for hotel charges. So, bonus points were 15x points awarded for my hotel charges.

I have been quite happy with Starwood's earning capability.