A few entries from Elon Musk's Twitter feed, from the first launch attempt a couple days ago:

Launch aborted by autosequence due to slower than expected thrust ramp. Seems ok on closer inspection. Cycling countdown.

Increasing helium spin start pressure. Probably <50% chance of passing all aborts, but worth a try. Countdown resuming ...

We called manual abort. Better to be paranoid and wrong. Bringing rocket down to borescope engines ...

All known rocket anomalies resolved. Will spend another day rechecking to be sure. Launch attempt tmrw eve w Wed as backup.

Press releases are press releases, and a press release will always spin things as favorably as possible. If you look at the other sources, though, they seem awfully forthright.