if it still has wax on it, it means they didnt scrape it as closely as they could .
which means they applied more wax then needed.
which means you'll wear it off after your next 3 warm up runs.
which means you're in safe hands- they didnt cut any corners.
dont worry- board waxing is a technical and precise art, and there is much literature regarding teh subject, but if you're a guy who's happy to ride whether it be park or laying in a carve in groomed, or surfing in between trees, it truly is as simple as getting the right wax FOR THE TEMP RANGE THAT YOU TYPICALLY RIDE, and a cheap iron from k-mart, dripping it on, massaging the wax in, then scraping the excess off with a plastic paint scraper from your local hardware...
then, take a couple of warm up runs- it will be slow till the excess wax wears off. after that- it'll be comfy and back to normal, and on top of that you'll be maintaining your board just like it should be.