Android : How can i find out when my build is distributed through all markets?

We are developing a mmo for google play store. When submitting a new build, we also want to deploy new changes to the server.

The problem is that after a build submit, it takes around 1-3 hours for the build to actually reach the store(s); the problem is that the server deploy is instant.. so the user may use the old client with the new server and that may cause crashes. 2 questions:

1) Does the build hit all the stores (SUA,UK,etc.) at the same time? I am inclined to think not.

2) Can i check if the build has reached a certain store (or all of them)? i.e. when i launch the build, can i check the store to see if there is a new version available (has actually reaches the servers to which the user belongs to on google play store)?