I typically see about 10% that don't get the newly assigned package out of each group. I've got to manually push the install to them. Most, however DO get it. I can't figure why some do not, while most do. There's really no differences, and in some cases, the ones that do not are a bit closer and better connections.
Of course, we see some where SMS pushes of updates fail on those computers, too. Sometimes, it's an OS anomaly and just imagine that, issues with Windows OS?
buyt pcAnywhere and use the packager tool that's included, that is, if it's still included. I LOVED that tool! It used to be free with some Symantec products. I still to this day use it to push out things that SMS can't do - reg changes, run batch files, etc. One of the coolest tools ever for getting things done on remote computers.