The first clues about June’s economic activity are in and the numbers leave room for optimism, but not nearly enough to eliminate worry entirely. Today’s reading on the services sector via the ISM Non-Manufacturing Report reveals a slower rate of growth last month. Meanwhile, the June reading on manufacturing shows that a slight increase in activity. The good news is that in both cases growth still has the upper hand, albeit at a lesser pace for services companies, which constitute the lion’s share of the private sector. Nonetheless, the idea that the summer of 2011 isn’t destined to follow the previous year’s dismal downturn remains alive and kicking. But the week’s ahead will surely test this faith.