Hey Pat -
I haven’t noticed a difference as of Winter '16 with Sublime/MM. MM did release version 5 a little while ago which caused a lot of issues. They have since pulled version 5 and replaced it with version 6 which is really just version 4. Make sure you are running version 4 or version 6 and not version 5 as if you are, that may be why you are seeing some issues/delays.
Its been a long time since I used resource bundles but I remember them going through the packing process very quickly. Once packaged, the “upload” time is depdenent on your internet connection, SFDC load, size of the resource, etc. but it should be rather quick assuming your static resource isn’t too large. I actually have a separate static resource for Images since they don’t change often. This keeps the JS/CSS static resource size to a minimum and packing/upload is quick.
