I will be starting work in a new company on August 16. They have filed for an extension/change of employer to my current H1B sponsored by my current emplyer. It looks like the VSC will take forever to process the extension request. Can I start working even if it is not yet approved by Ausgust 16. What are typically the chances that an extensiion be rejected? It is my first extension and have been maintaing my legal status all along.