Google has restrictions on the number of requests per second... so we purposely add a delay to get around that problem.
We are working on a free dot release update that will cache the data points so that google won't be needed for geocoding after the first display. This should resolve the problem. That update should be available sometime next month. Until then I'm afraid there is little that can be done to show more than a dozen points before Google starts rejecting the reqeusts.