Volvo has released its Q1 results - delayed as a result of the acquisition of Nissan Diesel.In headline terms, there's little that is unexpected here. We knew that the US market is plummeting, and here is evidence to confirm this view. Deliveries to North America slid 57 per cent in the January to April period to 9,964 units. The 2007 pre-buy writ large.Deliveries to Europe were relatively robust. In the first four months of the year, they edged increased by one per cent to 39,101 units. Shipments to West Europe slipped by six per cent, but rose 44 per cent to Eastern Europe.