While there is no way to know without tasting - and on that you'll just have to trust me - I thought I'd show some photos of some extractions.
1 - these shots are from a blend that has no dry processed coffees and no robusta.
2 - these shots are from beans that are about 48 hours past their peak.
3 - these shots are produced on an unmodified home espresso machine.
4 - these shots were incredibly good.