To Brian's original post, I would be very concerned with a salesperson who thinks a call a day is too much.
I have several clients in the midwest doing significantly more than that and the results have been staggering in a positive way.
Two metrics that you should look at, but are somewhat difficult to generate, as most CRMs don't offer them, are "days to contact" and "days to sold".
A lot of these posts are referencing the old best practice of a 90 day buying cycle. With all due respect,this is a myth. If you have a dialed in process for the first 5 days, you'll find the overwhelming majority of your buyers will be contacted in the first 5 days.
All the data I'm seeing recently tells me that if a prospect is contacting you, by phone or email, they are interviewing salespeople/dealerships. They are not researching.
In the end, it's up to the individual dealership. Do you want to be reactive or proactive?