What is the highest Level attained in Wordament?

I just reached Wordament Level 500 (Legend). 53,495 stars. Levels can be attained quicker when you subscribe to Premium. It now takes 80 stars per Level as compared to 160 stars per Level without Premium. Took me 10 months to reach Level 500. Is there an upper limit to the Levels? No one at Microsoft could really tell me. What is the highest Level anyone has seen for Wordament? I only play Quick Play, Medium/Hard. They need to have more puzzles to solve. I didn't get Premium till i was at Level 459. My quickest time for a 3-star puzzle is now 22 seconds. Quickest time to get 2-stars is 8 seconds.

:)