Shares of Pandora (NYSE:P) moved higher today after the company offered encouraging metrics for the month of September.

Still, it's not as great as it looks -- and I'll get to that shortly -- but it certainly wasn't as bad as many feared after last month's arrival of Apple's (NASDAQ:AAPL) iTunes Radio.

Pandora had initially taken a hit after it was revealed that 11 million people upgrading to iOS 7 kicked the tires of Apple's new streaming service. It always seemed like an incomplete metric. How many of those 11 million early adopters were Pandora listeners? How many of them only fired up the app once? How many were actually being introduced to a streaming music discovery platform -- making them possible Pandora converts in the future?

So, how did Pandora hold up? Well, the year-over-year numbers that Pandora published this morning are solid. 

  • Listener hours rose 18% to 1.36 billion.
  • Pandora's share of the U.S. radio listening market has increased from 6.53% to 7.77% over the past year.
  • There were 72.7 million active listeners during the month, 25% ahead of last year's tally.

The metrics aren't as flattering when we go sequential, pitting September against August. In that sense, listener hours were almost unchanged from the 1.35 billion hours it logged a month earlier.

The real test, of course, will come once we get October's metrics in early November. After all, the active listener count includes anyone that was tuning in to Pandora and may have switched to iTunes Radio later in the month after it was introduced. If active listeners and hours go down in October relative to September -- something that did not happen last year, for those curious about any seasonal shifts -- then it will be time to worry about iTunes Radio.

For now, Pandora has passed the test, but it's still not a complete test. Still, the market digs it and pushed the stock higher. But we still don't know if iTunes Radio will be Apple's next hit or if its limitation to PCs and iOS devices will restrict its appeal.

Pandora is safe -- for now -- but there's no reason to pop champagne corks until we get the October metrics.

Longtime Fool contributor Rick Munarriz has no position in any stocks mentioned. The Motley Fool recommends Apple and Pandora Media. The Motley Fool owns shares of Apple. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.