I ran a database of 23,902 unique user agents through both Tera-WURFL 2.0.0 RC4 and the new WURFL PHP API (1.0.1-rc2). Here are the results:

Tera-WURFL
Total Time: 12.081017971039
Devices Processed: 23902
Total Queries: 23912

WURFL PHP API
Total Time: 217.57795381546
Devices Processed: 23902
Total Queries: N/A

Both results were obtained after repeated testing to verify that the user agents were cached.