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:
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.