Now I have seen them get the books faster than a LGS. That has cost my LGS a few sales. Not because I saw it there and bought it, but because I saw it there, went to the LGS, asked about that very book and was told the "it's not out yet" line I have heard at numerous comic and hobby shops. If the store was honest and admitted they did not have it yet, I would have waited. Being lied to sent my business elsewhere on several occasions.
If your distributor is lazy or your shipments are late, do not lie about it. The “it’s not out yet” line worked 20 years ago. Customers know better nowadays.