This Tuesday we will be releasing Sweet Tooth 1.3.0.2 which will feature a new caching mechanism that will reduce the required rewards information load time for listing pages of 2 seconds per 30 products down to 0.08 seconds in our test. That's a big speed boost! It will also reduce the load time on the product info pages by about half a second, and in many other places as well where points are predicted.
You must have caching enabled to see this effect. In addition to adding caching functionality, we also reduced the load time required for the rewards data in the listing page by about 50%. Not bad!
Sweet Tooth 1.3.0.2 will be released on or before Tuesday, March 16 and it will also address some issues reported by the fine Magento community members.
UPDATE: We've delayed the release by 24 hours. Sorry folks!