Aww, better than a box of choccies anytime
I have to agree here,this is one of the traits that so many people cite and get wrong.
In all those I have met that are on the spectrum I have seen the same thing,they DO have empathy,often a lot more than their neurotypical peers, the problem they have is understanding and expressing those feelings in the correct manner and at the appropriate time.
Like emotions, these are feelings that someone on the spectrum often has little control over,they do not understand what it is they are feeling .
My ex has said she is often overwhelmed by a flood of conflicting feelings and sensations, she still has no instant clue how to sort out which is appropriate for the situation and so has to spend time sorting this out,this means her reactions and timing are totally out of skew with the situation and people simply do not give that time in a conversation.
Being one step behind they often learn to clam up or not show any reaction as it is easier than trying to deal with the situation and possible problems that arise from misunderstandings.