Well it worked for me, I got a CPL (A) with less than 70 hours PIC airplane. This is what I got back in an email from the CAA:
I can confirm that the holder of a valid EASA CPL(H) may apply the credits for helicopter PIC time towards the 200 hours flight time, which may include the PIC time, required for CPL(A) issue set out in Appendix 3 (E)(12). We hope it provides you with clarification and satisfactorily answers your query.
If you think about it logically, that's the only way you can interpret it.