Can GT5 Spec 2.0 + Price Drop Affect the Forza 4 Sales?

[ethomaz]

If the question was how many time to GT5 sell more weekly than Froza 4?

Today GT5 was holding 18k per week with Spec 2.0 + Price Drop (US) + Holidays it will sell over 20k (maybe 30k).

Forza 4 can hold over 30k until when?