Possible that there will be a surprise or two left as Audi hasn't released all of the information to us yet. Below is the latest email from Audi regarding the A5/S5:

Remember: At the Geneva Motor Show, the new coupé will be unveiled to the world. Watch the world premiere live over videostream on Tuesday, 6 March, from 8am to 8.15am (CET).

Immediately after the world premiere, the full A5 website will be ready to access.

Best regards,
Your Audi A5 Team

Not sure if that will be the case but if so then we should be able to put in our custom orders for our cars in early June for the three month build time.

Currently, with no specs and all. I think that is what they mean by the full A5 website will be ready to access. I do hope for some surprises like DSG/S-Tronic.