all good information however, whats a matter for you, can't you check your batteries while they are charging?
Of course you can.
First rule of thumb is that lipo's should not get warmer during charge and in fact, if you charge just after a flight (and the lipo is already warm) then it should cool down during the charge.
Second, check to see if your lipo is puffing during the charge and if so, stop the charge!
Basically, it comes down to common sense vs printed media and what someone else said. With lipo's, it pays to err on the side of caution! I love lipo's and I assume that all is NOT well, until I can prove otherwise!
Michael (if your not fryin, your not tryin!)