The Disney resort concierges are definitely not created equal. If you are familiar with the GF, Poly or AKL concierge lounge, you will notice a difference. The YC lounge is much smaller, has very limited seating and their balcony overlooks the parking lot. It does only remain open during food service hours also, meaning that you can go in from 7am-10:30am, but from 10:30am-11am, the doors to the lounge will be closed. That's not a big deal for some people, while others like the availability of the extra space at all times.
I will have to say that the pre-planning staff is probably the best I've ever worked with. They are warm and friendly. I did have a few problems with the on site staff, so I'll reserve comment there.
As to distance from the main lobby, you simply enter the elevator banks that are a few feet from the lobby registration area and use your room key to access the 5th floor. When you get off the elevator, the concierge staff is sitting right there and the lounge is just around the corner. Our room was down two very long hallways, so it was quite a hike.
Tammi