I don't buy NF scopes for their reticles, until you get above 10X. I buy them for their bombproofness, in every way.
I have been using the standard mil-dot reticle in a 2.5-10 for a while, and find it as fast as any other NF reticle in the 1-4 or 2.5-10 family.
I find the IHR to be just fine, but if I wanted longer range ability (which I do) as well as close up speed, I would choose the Mil-dot for now.