I have compiled a page with performance tests of Domino Accelerator Pack. One server test and one web client test.

The server test shows a significant increase in ability to deliver pages 1761 pages/s versus 636 pages/s without DAP.

Even though DAP delivers nearly three times as many pages/second the CPU load is much lower using DAP.

The web client test shows how much compression does for page load time over different connections. This test is performed on a server without load. Differences would be higher for a server with load as DAP's caching would help keep CPU load down.

http://www.dominoexperts.com/dapPerformance