This is not true. A single-member LLC gets the benefit of the personal liability shield.
However, as with any limited liability form, you can get the liability shield pierced if you don't properly organize and operate the LLC.
Because a single-member LLC has only one member, it might more likely to get the liability shield pierced since there isn't more than one party watching the documents and "formalities." (I put formalities in quotes because LLCs have very few formalities).
Source: Advising Small Business by Steven Alberty, Section 7:17.
Not to be condescending but good luck citing that in Court.
>>Example, I would always advise against a "single member" LLC because an LLC is considered a Partnership, thus Courts will not enforce Partnership protection where there are no Partners (ie, single member) and "the LLC can be liable for Founder's personal debts"
Re-read what you quoted, specifically focus on, "the LLC can be liable for Founder's personal debts". Your response: This is not true. A single-member LLC gets the benefit of the personal liability shield. Allow me to return favor and say "this is not true." While the Owner of a single member LLC may be protected against the LLC liabilities, that same LLC can be liable for the personal debt/judgments of the single member Owner.
The Florida Supreme Court recently issued the Olmstead v. Federal Trade Commission case. The case's holding is that F.S. 608.433 (4) allows a court to order a debtor to surrender "all right, title, and interest" in the debtor's single-member LLC to satisfy an outstanding judgment, unlike many other states where the sole remedy is a charging order.