Do us all a favor and move all ETFs off of scAMEX and onto Nascrack. Its just ridiculas that you can't hit the b/o on issues that trade tens of millions of shares when they really start moving.
Many have been moved to NYSE, in phase 1 of the transitioning away from AMEX. More are getting moved in the next few months.
in my experience, fast fills and honorable quotes are not one bit better on nyse than on amex for the ishares.