It’s after the peak of the evening commute now, but still close enough where rebalancing issues aren’t resolved from today’s evening commute.
On the CaBi map, you can see the stations that have emptied out: Downtown, Foggy Bottom, Metro Center, National Mall in DC; Court House area and the Ballston Metro in Arlington.
https://secure.capitalbikeshare.com/map/
I only see that one Arlington station is completely full now. I don’t know how much of the rebalancing is due to natural usage patterns and how much is due to rebalancing crews. I’ve seen the rebalancing vans in Arlington and in DC frequently, so I know they don’t focus only on DC.
I’m not too familiar with the Westover neighborhood. But if there’s a natural one-way commute pattern during rush hours, there is a possibility of rebalancing issues. I don’t know how many vans are in use in Arlington. If it’s only one, it will have to travel from locations like Westover to the in-demand areas like Court House, Ballston, Pentagon City and Crystal City.