Hey Mike,
I'm glad to herd you like the program. I wanted to get you some answers to your questions.
Test Data - When you sync a company file with your Method account, the account becomes bound to that file. If you wanted to sync with another company file, you would need another account.
Dropdowns - What will cause a slowdown is the amount of data on that table. If your dropdown list has 3000 entries, it can take 2 - 3 second to load. We are always looking for ways to upgrade the speed in Method, as soon as we find something faster, we will let our users know.
I hope this helps, if you need more just post