Maybe it's worth mentioning some things about things being audible:
1. Different people have different critical listening skills. Some may hear it, some may not.
2. Some playback systems have higher resolution which may make jitter effect more audible.
3. It can be difficult to have a recording that demonstrates jitter. I'm not aware of any jitter test discs but I am making one now. If you are in Atlanta, I may be able to demonstrate the effect for you.
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AGGGGGGGGGGGGg
AGAGAGAGGAGA
AGG
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NO
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NO NO NO
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***NO CARRIER***