You are spot on, my friend. Service is sales, and sales is service. I would also add that service is simple.
Why simple? Well, as I'm sure you know, the one thing that will always differentiate you from your competition, which you have the MOST control over, and which you can improve almost immediately if you so choose is... service.
Customers want, expect and DESERVE a great service experience. The businesses that deliver consistently in this area, reap the benefits of customer loyalty, referrals and amazing viral marketing benefits via 'word-of-mouth' advertising.
Your story proves this in spades.
Kudo's and congrats on your success. Thanks for sharing your thoughts.