I grew up very close to the high elevation spot and in marginal events, there can be a significant difference between my house and ILG. Best recent example I can think of is 2/3/14 where I received over 4 inches and the airport barely got 1. In the last winter I measured every event in North Wilmington (2014-15), I received about 30% more snow than the airport over the season.
That being said, I do understand @RevWarReenactor's frustration about the area because that area is often painstakingly close to bigger events but ends up on the wrong side of the gradient. @psuhoffman outlined this before with Miller Bs, but it's true for mixed events and southern sliders too. Mdecoy's situation is a bit worse than mine was when I lived in DE, but I still missed out on events such as 2/1994, 12/1995, 12/14/13, and 3/4/19 by maybe 20 miles. Meanwhile storms like 1/30/10, both March 2014 storms, 2/16/15, and 1/13/19 were advisory level storms while downstate and the DMV got crushed. Delaware is also pretty susceptible to dry slotting during big Miller As, which was most evident in the Blizzard of 2016 when NCC was a relative minima compared to the surrounding areas.