Nullable <DateTime> nullcheck when comparing?

Question

I have the following code

List<DateTime?> dtDates = new List<DateTime?>()
{
    null,
    DateTime.Today.AddDays(1),
    DateTime.Today.AddDays(-1)
};

IEnumerable<DateTime?> result = dtDates.Where(x => x > DateTime.Today);

Why doesn't he need a nullcheck like x.HasValue && x.Value > DateTime.Today

Here is a simplified version of the problem:

bool dtresult = null < DateTime.Today; 
bool iresult = null < 6;

Is there a mistake in the comparison method?