As per usual Sofitel sent out an online questionnaire after the stay and apparently these are being read by management as this just arrived in my inbox:
Dear starflyergold:
Thank you very much for taking the time to share your comments regarding your stay at the Sofitel Washington DC. Exceptional service is what we strive for; therefore your feedback is extremely important as it helps us to continually improve and provides a memorable experience to our valued guests.
Please allow me to express my most sincere apologies regarding the missing A-Club Platinum welcome amenities. Please rest assured that we have taken the appropriate measures to address the problem with our Director of Rooms in order to prevent a future occurrence. As a gesture of goodwill, we would like to offer you a special welcome amenity during your next stay with us.
Our relationship with our guests is of paramount importance. We are hopeful that you will present us the opportunity to welcome you back to the Sofitel Washington D.C. Lafayette Square and demonstrate the quality of service you have the right to expect from our hotel.
....
General Manager
Good response and also encouragement for all us A-Club elites to make sure to let them know when they get it wrong (and indeed when they get it right) ^