Vista's Ready Boost No Match for RAM

I've been watching Ready Boost in Vista for a while now and I've read different things about how much of an improvement this feature is supposed to have but the crew at Tom's Hardware put it all to rest with a very nice test comparing Ready Boost vs Memory RAM:

Although an additional USB 2.0 Flash memory device clearly helps to increase application responsiveness at launch time (we've experienced time savings in this area of up to 50%), upgrading an average computer from 512 MB to at least 1 GB of RAM makes a huge difference. Microsoft may argue that adding a Flash memory stick already has a tremendous impact on subjective performance, reducing application launch times considerably. And that's all true; the performance impact is considerable, but Windows Vista still remains slow in the end.

I wasn't surprised to see that having more system memory would give the biggest improvement but I was surprised to see how in certain configurations the USB flash memory with Ready Boost could make up to a 50% improvement. I think when I upgrade to Vista I will use a USB flash drive with Ready Boost just in case it gives me better performance.