This evening a friend of mine (you know who you are) started a conversation with in this way
– Do you use DirectAccess?
– Yes, we do
The conversation continued with questions about performance, expectations and such. In the end i sent him a very nice TechNet article about capacity planning and performance metrics that is useful, and here it is for the rest of you that also have the same question but never got an answer.
Please continue the reading here: https://technet.microsoft.com/en-us/library/jj735301.aspx