What is a good group XP rate?

[footlongcorndog]

What is a good group XP rate on this server? My highest level toon is in the late 30s and when I solo I get about 30% even up to 40% an hour. But when I group, the best I can get is about 20% per hour. I also die way more in groups then solo, so that rate drops even lower.

I like grouping a lot more than playing solo, but I like progress more than anything. Is 20% per hour a good rate? Or have I just had a lot of bad luck when I group?