Scott, I think you're missing the point that while meditation can be spiritual for some, it doesn't have to be for others. People have this misconception that meditation is linked to Hinduism/Yoga. While it is linked to it, that doesn't mean you have to follow the life of a Yogi to be a successful meditator. For some people, it's a purely secular thing.
For me, I know I feel a spiritual presence within me when I meditate but it has nothing to do with any religion. It is simply the spirit of the cosmos flowing throughout my soul.