While I was reproducing a problem, I had both 1P 6 for Windows and the web app open and unlocked. I saw that syncing is happening very fast, I would say almost instantly.
But I was wondering, how this data is protected when it is synced "live"? I've read in the security whitepaper about the protection of data at rest, but I did not see much concerning sync (or maybe this is worded differently and I missed it. In this case my apologies).
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: 1Password.com