It’s understandable that you (or any rational person) might not want to automatically take as a matter of faith information put out by a random person on an internet forum, in particular when money and taxes are being discussed. However, before you come back with a doubting reply, I suggest that you do an online search, especially when verifying (or debunking) what has been posted can be done so easily in this case.
Here is some information from the best source, the IRS (see the third FAQ here, “What can be excluded from gifts?”):
Frequently Asked Questions on Gift Taxes | Internal Revenue Service (irs.gov)
And if you want to see the legalese from the IRC, I have helped you with that as well (see subsection (e)):
You are welcome.