aab1 wrote:BTW why do some of these supposedly top quality coffees use 60% or more robusta beans? Is this common for espresso blends?
Lavazza is not a 'top quality coffee'. It's one of the many Italian coffees you'll find in a supermarket, with Illy, Segafredo, Kimbo, Mokambo sometimes, etc.
However, I would like to defend Robusta here. A blend with quite some Robusta in it can be very, very good - although I think some on this forum will disagree. Recently I've had blend with 1/3 Robusta (from a local roaster in Vienne, France, no less**) that was truly excellent: balanced, well structured, a nice hint of dark fruit (but not too much), just the right amount of bitterness, etc. etc. A take on espresso that was very French. I guess it depends on your (or my) definition of 'top quality'.
(**) I wish I could tell more about the blend. I asked what they had, but the girl behind the counter just pointed to a
pancarte on which was written:
mélange maison, mélange Italien, mélange 1/3 robusta, etc.