In my thinking I would not think so. It does basically the same thing on the compression stroke. Some air is going to escape in that situation be it a little past the rings if the cylinder walls are dry and it being cold or maybe a valve that has not sealed completely. If you thought it was excessive you could chuck an air compressor up through one of the spark plug holes at about 100psi and listen for where it is coming out. If you hear it coming out of the oil fill then it is some getting past the rings, a little is normal. Back through the intake would tell you an intake valve and out the exhaust would be the exhaust. Both of those should seal up tight. Of course that is advice from a backyard hack also :)
