BIG DRAMA!!!
GRU is my home airport.
a) RCC there is better than IAD and ORD. Specially regarding food. At GRU I can sit down turn my laptop and have a waiter serve food and wine. The Cappuccino machine works and its open from 7am until about 11pm, so it can also be used when flying with SWISS or LH on the afternoon flights
b) Have you ever tried the VARIG lounge that LH and LX use in GRU? RCC is much quieter with better food. Every time I have to fly LH or LX I go to the RCC.
c) I've been there 4 times only this month. Unitedwas supposed to close for renovation since January this year. However INFRAERO who is responsible for the airport did not give the permits for that yet.
d) I would prefer GRU RCC over nay RCC on the US.