AdWords ROI in affiliate marketing

Are these results typical?

[gabby]

I just ran an AdWords campaign where I spent $311. This resulted in commissions of $587. My profit was $276 (587 - 311 =276).

Are these results typical. Just wondering what others are experiencing. This campaign was over a 22 day period.

[eljefe3]

Depends on the industry, but I'm sure many would agree that's it's better to be in the black than in the red.

I've seen some ROI's as high as 800% in affiiate marketing, but to achieve this you need to find keywords/niches that are untapped by the majority of PPC affiliate marketers.