Entity Framework 5 빠른로드. 쿼리는 어떻게 작성됩니까?

EF5를 가지고 놀면서 이상한 점을 발견했습니다. 이 두 클래스와 간단한 쿼리가 주어지면

public class Customer {
  public string Name { get; set; }
  public string Email { get; set; }
  ...
  public virtual IList<Order> Orders { get; set; }
} 

public class Order {
  public Customer Cust { get; set; }
  public Datetime DateOrdered { get; set; }
  ...
}

using (var ctx = new DatabaseContext(connstring))
{
 Customer c= ctx.customers.Include(x => x.orders).Where(x => x.Id == 1).Single<Customer>();

 foreach (Order o in c.orders)
 {
   Console.WriteLine(o.ToString());
 }
}

SQL Server Profiler 출력을 확인했는데 쿼리가 불필요하게 복잡하다고 생각합니다.

SELECT 
[Project1].[Id] AS [Id], 
[Project1].[name] AS [name], 
[Project1].[C1] AS [C1], 
[Project1].[Id1] AS [Id1], 
[Project1].[customer_Id] AS [customer_Id], 
[Project1].[timeordered] AS [timeordered]
FROM ( SELECT 
    [Limit1].[Id] AS [Id], 
    [Limit1].[name] AS [name], 
    [Extent2].[Id] AS [Id1], 
    [Extent2].[customer_Id] AS [customer_Id], 
    [Extent2].[timeordered] AS [timeordered], 
    CASE WHEN ([Extent2].[Id] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1]
    FROM   (SELECT TOP (2) [Extent1].[Id] AS [Id], [Extent1].[name] AS [name]
        FROM [dbo].[Customers] AS [Extent1]
        WHERE 1 = [Extent1].[Id] ) AS [Limit1]
    LEFT OUTER JOIN [dbo].[Orders] AS [Extent2] ON [Limit1].[Id] = [Extent2].[customer_Id]
)  AS [Project1]
ORDER BY [Project1].[Id] ASC, [Project1].[C1] ASC

내가 뭔가를 놓치고 있다고 확신하지만 무엇을 모르거나 eager loading의 정상적인 동작입니까?