Smoking a cigar right out of a new box is a temptation I nearly always give in to. Sometimes they are fine, sometimes too wet. I agree with BWA, 70 is too wet. I'm pretty sure I've received boxes that are significantly wetter, and they don't smoke worth a shit.

I live in a dry area, and I think local climate needs to be considered. We have one B&M here and while they have a decent selection, they don't smoke cigars and they don't know shit about taking care of them. So, cigars that don't sell quickly - within a month or so - may be dry enough to necessitate re-humidifying before they can be enjoyed. Left in that store long enough, they are ruined.

So, I'm pretty careful at home. The ambient rh is nearly always lower than 65%, so I check my hydros at least a coupla times a week. When cigars come in that are too wet (and I don't plan to sit on them for a while), I have to give them as long as 3-4 months before they (slowly) come down to something smokable.