According to ILRG.com, the majority of Howard grads take the bar exam in NY. They managed a 61% bar passage rate in 2007, which was the lowest of any school whose graduates primarily took the bar in NY (15.5% lower than the state average). That basically says it all.
Yet, when you look at the employment stats, Howard's graduates are very similiar to upper Tier 2 or lower Tier 1 graduates. There are just tons more employers, including big law firms interviewing there, menaing many more opporutnities for its students and graduates.
Seems unlikely. Don't trust employment stats.
In response to your general Q:
1. As noted, the atmosphere might not be that welcoming to whites, espeically any whites who aren't insanely liberal, and/or constantly professing guilt for the alleged sins of their forebears.
2. Academic standards aren't that high in comparison to higher-ranked schools.
3. Facilities aren't great.
4. As noted, the employers are there to hire minorities. No reason to hire a white kid with (probably) relatively low entrance credentials -- they can be obtained from more competitive schools.
I know a black girl who is considering Howard, because she loves the atmosphere. I know she'll get a full ride and be happy there, so I've encouraged her to do it. I know she'll probably end up near the top of her class (she has very good numbers and attitude), and that should make her very marketable. But I don't think the same analysis applies to a white kid.
I think the only reason for a white kid to attend Howard is if he/she's really focused on the civil rights angle that Howard emphasises, wants to study in D.C., and can't get into a higher-ranked program.