That's a good thing in all respect. The engine will load of if it's running rich. Remember this. Rich = longer lasting Lean = More power + dead engine quicker
Break-in's that I do, idle's never happen! The thing usually can't idle until the third tank or so
I say read the manual and do exactly what it says. I go a little more extreme though, I like the fact that I know my breaking in motor is so rich that more fuel is coming out than it's burning
I will say this though, be EASY on it for the first 5-6 maybe more tanks. I NEVER hit more than 1/2 throttle during break in, and I WILL never. It's a good motto for me. 1/2 is great for full after eight. I break'em in for eight tanks
Just be easy on it and do like the manual says. If you run it nice and rich and take it easy, it'll be a nice motor. Go balls to the walls now, might as well rebuild it now

Anyone here will tell you this, a correctly broken in motor will always be better than an incorrectly broken in motor.

They'll last longer, perform better, and run better.