It depends on how early and how much actual contact there is. If the lock is at 5-10%, it is most likely less than ideal, and if the lock is later (40%) but there is next to no actual contact (something like the tip of a pen contact area) is less than ideal. I have had locks with very early (~10%) lockup and they were solid as a rock, and ones with almost no contact area that weren't going anywhere. Also had the exact opposite.
I recently got a knife (Brous Bionic) with terribly early lockup (5% or less) and initially the lock failed under any pressure. I worked it and worked it until it hit 5% and was solid, but didn't instill confidence, so I sanded the lock bar down an EXTREMELY small amount and now the lock is dead solid at 10%. Damn lock came with the engagement surface painted over... No inspection of it at all. If I didn't love the knife, no way would I allow that kind of piss poor QC in my house.