I don't think it's debateable at all, the extreme traction limits of summer tires are better/higher that A/S tires. The key is you don't get into situations that require this level of traction in the summer unless: a) you drive "in a sporting manner" like myself, b) you get into an accident avoidance situation, c) it's raining.
Don't get me going on "performance" A/S tires in the rain. They blow compared to a high end summer tire.
The key is the difference between A/S and summer tires is much less noticeable at normal speeds and situations than the difference between a winter tire and A/S in a winter situation.
In my mind, A/S tires are a quieter, longer-lasting summer tire.