Every single petco and pet smart is different. Although the corperation holds the same general standards different stores order from different breeders and each store manager holds certain levels of standards as they see fit. So its tough to say.
At petco you are not allowed to take pictures in the store because of the trouble they have had in the past with PIDA taking pictures and psoting them online.
I ran the Petco reptile department at one petco for a couple years so i can tell you about that specific one, but as i said they are all different.
Generally speaking they do all work with a vet (they started doing that after all the law suits for animal cruelty a few years back) although the vets are not always good reptile specific vets because they use the same vet (usually) for their birds, small animals and reptiles.
Care in my petco was:
spot cleaned daily
weekly total cage cleans
ok temps (a bit on the low side but not too too bad) The big problem i had with the heating system at Petco was that all the reptile tanks had central heat. So for animals like beardies that need a real hot spot to stimulate their digestive system properly it didn't work so well.
Mealworms fed constantly
Crickets daily or every other day
Crickets are gutloaded and calcium dusted
substrate = Calci-sand for ALL leos, regardless of size 
My biggest issues with that particular petco reptile care was the size of their animals. Leos and beardies in particular and ball pythons came in soooo tiny it is ridiculous! I mean sometimes they haven't even had their first shed. Fecals are never preformed so its hard to say if they have parasites or not. I also hated the fact that they were on Calci-sand. The petco i worked at got their leo's mostly from Calzoo exotics...I don't know too much about them but i doubt they are that good if they ship their babies so tiny.
I think the biggest problems are probably size, parasites, calcisand and over crowding.
I was going to post a pic of my baby leo that died shortly after i got it from petco from a superinfection of parsites despite my efforts and the efforts of my vet to save him, but apparently i deleted the picture. Oh well...
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0.1 Bearded dragon
0.1 mexican Black kingsnake
1.1 Leopard Gecko's
0.0.1 Tokay Gecko
1.0 Blue Tongue Skink
0.0.1 Reverse Okeetee Corn
0.1 Anerythristic Corn
0.0.1 Red Tegu
0.1 Bullmastiff
4.1 Cats