The term didn't originate here. It's called club level because that is how Disney now refers to it.
Check out their website and you will see the concierge is now called club level. Here is the text for a quote for the Boardwalk:
Standard Room - Club Level -$641 †
Concierge service at the Innkeepers Club includes personalized front desk and guest services, turndown service, and lounge with Continental breakfast, midday snacks, evening wine and cheese, and evening cordials and dessert. All rooms have two queen-size beds or one king-size bed, table and chairs, ceiling fan, vanity area with two sinks, and bath. Some rooms offer day bed and private balcony. Non-smoking and disabled-accessible rooms are available. Amenities include in-room wall safe, voice mail, data port on phone, hairdryer, iron and ironing board, and refrigerator (upon request). Standard View, Concierge Rooms offer views of a garden or parking area.
So while they still use the word concierge, it's officially called club level.
If you go to the area of the website to compare the resort, it refers to "club-level" concierge and "desk" concierge.