It is true, at least as far as I've been able to establish that it is more likely that you'd have meconium again, but like others have said, it needs to be taken in context. If the meconium is old and all other signs are that the baby and you are healthy and happy then there's no great reason for concern. If the meconium is fresh and/or thick/excessive and it's combined with changes to the baby's heart rate that might indicate distress then you might want to think differently.
I asked my (very experienced independent) midwife about this recently when a client had to transfer in to hospital when her waters went and there was meconium, even though there was no other reason for concern - it was just policy. She was appalled. However, she is able to make clinical decisions based purely on the situation she's faced with whereas the NHS midwives have their trust's policies to work to - whether they agree with them or not.
I have been at two births where there was a lot of thick, fresh meconium and both babies needed suction and a bit of help in the first few minutes to get going, though they were both fine shortly afterwards. The level of support they needed could have been provided at home - some suction, a good rub down and some wafts from the oxygen canister while they got their breathing going (though both happened in hospital). I know that's just anecdotal but I know I won't feel too stressed out if there's meconium in my waters this time unless there are other problems arising with it.
Gina. x