Wanted to follow up on this; We didn't have the luxury of time to just put a few gallons in and wait/test but we did fill up the vehicle and upon filling this particular starting issue did subside.
We don't let our vehicle's tanks get below half a tank in the winter, in case of snow storm, etc., so it may be some time before the symptoms are exhibited again. That is unless I get the time to replace this part before Winter is over.

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2005 Titanium Silver X5 4.8is (DD winter) * 2001 Steel Blue 750iL (DD summer) * 2001 Ford Excursion 7.3 L <> 2005 X5 3.0 * 2003 X5 4.4i * 2009 X3 3.0 * 2009 X5 3.0 * 2007 Toyota Avalon Limited