You will find a WIDE range of reviews for every resort and every concierge service.
That said....our family has stayed at the Yacht Club conicerge several times and will be back there again next week. (3 nights at the CR concierge and 5 nights at YC concierge)
For this trip we received the 5th floor room key so we can take the elevator up (you need a special room key to activiate the 5th floor on the elevator) and check in at the concierge desk instead of the front desk. We haven't always received this key.
Along with the room key we also received a page to fill out and mail or fax back to them for our priority seatings or any other plans. I called instead.
We have always had pleasant CM's - some are more friendly and talkative than others. It's not a big deal to us if they don't look up every time we get out of the elevator...usually we just say hi first. (DD5 is used to the Polynesian and usually says - Hello Ah! - her version of Aloha!)
We stay concierge for a lot of reasons but a big one is being able to get breakfast without having to leave the resort. We have been happy with the food offerings.
Other people can give you more of a report, but I've got to get kids off to school.
Sounds like you want reassurance that the resort - anc concierge are ok - since you will be going there in the future.
The Yacht Club is a beautiful resort at a great location. I am sure that you will enjoy yourself!
Jill