Ah, so new notes are fast, but editing old notes takes longer?
Yes. New notes are not an issue.
There is a refresh problem with the current version. We have a fix in the next release (goes into beta today).
The sync occurs, but the screen may not show the changes. Changes to text should appear, but changes to title/date/on-the-agenda status will not. You can force a refresh by changing to another project and back.