An Apple Senior Advisor called me this morning regarding the sleep/failure to wake problem. He consulted the engineers after they had two of my captured data files (one after the MBA was erased and a clean install of 10.9.1 reinstalled).
I was told the engineers said to tell me "it is the customer's fault because she was touching a key too soon after sleep." I explained it was accidental when typing (sometimes hit the power button instead of the delete key and the unit freezes causing data loss) and this is not a problem with my other Apple computers.
The advisor said to "change the energy settings to never turn off display". I then explained I purchased the air because of its outstanding battery life and using these settings is not a fix. His reply: "Turn it back down when you are finished."
I said I was very disappointed that the laptop is not performing as designed and was sorry to hear they refused to repair the flaw and worse yet to blame it on the consumer not using the laptop properly.
Apple customer care went from denying a problem to blaming the problem on the consumer.
Next I will call customer service, but this too, will be a dead end. I am out of ideas--they won.