Same problem here, on MacOS. After the upload phase nothing happens, but the upload goes through as it takes a while… No proxy here so I guess that is not the issue.
Here is my ionic info output
Cordova CLI: 6.0.0
Gulp version: CLI version 3.9.1
Gulp local: Local version 3.9.1
Ionic Version: 1.2.4
Ionic CLI Version: 1.7.14
Ionic App Lib Version: 0.7.0
ios-deploy version: 1.8.5
ios-sim version: 5.0.6
OS: Mac OS X El Capitan
Node Version: v4.3.1
Xcode version: Xcode 7.2.1 Build version 7C1002