Yes.
The email now includes the Selected Object so you can easily confirm which object was used during migration (for example, Account, Case, Opportunity, etc.). 
PS: View Drag, Drop & Upload Files to Amazon S3, a Salesforce AppExchange app for moving files from Salesforce to Amazon S3: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3000000B5ZPqEAN