I don't think so. Imagine this exchange at the first presidential debate:
Romney: Obamacare is the greatest tax increase in history.
Obama: Well George, I modeled my plan after your Massachusetts health care plan.
Romney: Well...yeah...
How many pages is Obamacare?
You are wrong.
This hurts Obama and this helps Romney.
Romney: Well...yeah... However, as a purported constitutional lawyer, it'd be reasonable to expect you would also understand that each sovereign state in the 50 -- and by the way, not 57 -- United States has its own specific goals, objectives and needs. The health care program that my administration set... warts and all.. was what we believed to be the overall the right course of action, specifically for Massachussetts. That said... what may work for one state should never be construed as the model for all 50. That is where I draw the line. Your disastrous, 2,700-page monstrosity, with all its complexities and taxes, must and will, if the American people elect me to replace you, be repealed and replaced with a far more patient-centered, far less intrusive, and far less expensive program.
THAT should be Romney's response. Whether it will or not remains to be seen.