My answer is no. My LFS always is getting in plecos under the correct L number... most of the time i see the wrong ones. Suppliers aren't always going to comb the fish to make sure they are sending the right one. In fact I just had 4 L200 Green Phantoms ordered for me, and 1 was an L128, Blue Phantom. I can't count the number of times I've seen veiled Temminki plecs as Butterfly L046... anyone that has some experience with plecs knows that a green veiled bristlenose is a far shot from the ZEBRA L046. In short, most of the time the L number given to the fish is right, but not always is the right L number given to the right fish.