I think Dubreuil/Lauzon did the ballroom style of the tango.
Any CD would've favored both D/S teams anyway, who are superior compulsory dancers to the rest of the field. Most of Igor's teams do better in the other two segments. From the GP, the top Argentinean tango scores were:
38.96 Delobel & Schoenfelder NHK
38.77 Domnina & Shabalin CoC
35.89 Belbin & Agosto CoC
34.67 Virtue & Moir NHK
34.23 Khokhlova & Novitski NHK
31.79 Kerr & Kerr NHK
30.81 Zaretski & Zaretski CoC
29.85 Fraser & Lukanin NHK
28.25 Navarro & Bommentre NHK