ext3 with ordered (default) or journal mode, yes. In writeback mode you might lose data, but maybe not to 0 byte as with xfs.
I'm no expert, but xfs (and jfs, which I use, too) are prone to data losses in case of a crash or power out. This is usually no problem as this happens only rarely and the higher performance should be worth it, but in higher risk environments I wouldn't use these file systems.