I was at least one of the people who mentioned the freeway and train.
Like all developments built in the 04-06 time frame, Silvercrest will likely be hit hard with foreclosures and short sales.
Being just a few hundred feet from the freeway, the noise will definitely be a negative.
As for the commuter train, it has not turned out to be as much of an issue as I would have thought now that it is actually running. Since the train moves slower than a freight train, it has a much softer horn – I would equate it to the whimpy sound of Japanese car horns. Not very intrusive, unless maybe your house backs up to the tracks. For all other homes in the area, I bet it blends right in with the freeway noise. I haven’t spent time listening in Silvercrest, so that’s just a guess.
I have also noted that asking prices in Silvercrest are just about even with the 2004 purchase prices, so another factor could be that, on top of the short sales and foreclosures, some people are bailing out before they become underwater.