Expatriation Tax?

Since CPR is treated the same as LPR, my answer would be "yes". They are both treated as permanent residents. But although I am no tax expert, I believe this issue will ultimately be decided by the below immigration regulation, which states:

Sec. 216.1 Definition of conditional permanent resident.

A conditional permanent resident is an alien who has been lawfully admitted for permanent residence within the meaning of section 101(a)(20) of the Act, except that a conditional permanent resident is also subject to the conditions and responsibilities set forth in section 216 or 216A of the Act, whichever is applicable, and § 216 of this chapter. Unless otherwise specified, the rights, privileges, responsibilities and duties which apply to all other lawful permanent residents apply equally to conditional permanent residents, including but not limited to the right to apply for naturalization (if otherwise eligible), the right to file petitions on behalf of qualifying relatives, the privilege of residing permanently in the United States as an immigrant in accordance with the immigration laws, such status not having changed; the duty to register with the Selective Service System, when required; and the responsibility for complying with all laws and regulations of the United States. All references within this chapter to lawful permanent residents apply equally to conditional permanent residents, unless otherwise specified. The conditions of section 216 of the Act shall not apply to lawful permanent resident status based on a self-petitioning relationship under section 204(a)(1)(A)(iii) , 204(a)(1)(A)(iv) , 204(a)(1)(B)(ii) , or 204(a)(1)(B)(iii) of the Act or based on eligibility as the derivative child of a self-petitioning spouse under section 204(a)(1)(A)(iii) or 204(a)(1)(B)(ii) of the Act, regardless of the date on which the marriage to the abusive citizen or lawful permanent resident occurred. (Amended 5/23/94; 59 FR 26587 ) (Amended 3/26/96; 61 FR 13061 )