I'm a strong believer in the customer being right.

Hadn't thought of it at the natural progression of one year; was thinking about fighting to get at the next level up. So, they are completely blowing smoke on the math comparison as a way to dodge your requirement.

Nothing like a government site to blow smoke back at...
Here's the What Works Clearinghouse on Saxon math:
http://ies.ed.gov/ncee/WWC/interventionreport.aspx?sid=447
and on Everyday Math:
http://ies.ed.gov/ncee/WWC/interventionreport.aspx?sid=166

I came across this when the discussion came up here acouple of months ago as philosophically I kinda like the Everyday Math concept when done right.