I've heard that being referenced before. It's a favorite of circumcision advocates to trot out. Of course, it completely fails to acknowledge that there is no significant observed difference in HIV rates between circumcised and non-circumcised males in the developed world (or even the entire world itself), which means that even if the researchers could be absolutely certain it was specifically due to circumcision (which they can't) it would still be a complete non-argument when it comes to applying it in the west.
Agreed--it's only an indication of what happens when you don't have decent sex ed or resources. Condoms are far superior.
Add to availability of condoms and sex and hygiene ed the fact that clean water and soap is more readily available outside major parts of Africa, and there remains no argument for circumcision. Especially not for infants who still have many years before engaging in sexual relations. By sexual maturity, they can hopefully reach an informed decision on if they want to get mutilated or not.