I have the same experience: my MBP with 8GB RAM and SSD is pretty fast running Lion. But my two-year old Mac Mini at work with 4GB and platter disk runs terribl

I have the same experience: my MBP with 8GB RAM and SSD is pretty fast running Lion. But my two-year old Mac Mini at work with 4GB and platter disk runs terribly slow ever since I did a clean Lion install.