I believe that's good, but you did not indicate if that's google ad-sense statistics or hub-pages statistics. Hub-pages will say you have more views because its within hub-pages.
Adsense page impressions are the ones that really count, even though increasing hubpages statistic views is still a very good indicator, but the impressions are what to really look at on your adsense account.
PS: If thats 150 page impressions from your adsense account, that's phenomenal for only 12 hubs. (in my opinion)