So, I was testing with my friend Apply bluetooth keyboard, and it actually works amazingly fast with the D3. Pairing was simple, using 0000, then hitting 0000 on the keyboard and Return.
There was no lag. I did try testing with my logitech bluetooth keyboard but for whatever reason it didn't want to pair. I was using my MX5000 setup. I'll have to try again, but this makes it a very good solution for students looking to keep up with some clean notes and the D3. Which is what im going to do for my daughter now.