I wondered this, after being grounded for seven months following an accident in which I was the non flying pilot. I rented a plane, and hired an instructor, and the flying was just fine - like I flew it a few hours the day before. The instructor not only gave me a pass, but actually complimented my flying. I can't speak for the freshness of other pilots, and more complex flying environments, but for me, yes, just like riding a bike when I came back to it. 'Truth is that I had more trouble coming back to the bike!