Well, after checking their financials:
NWBC
the additional argument can be made that they really are not in all that bad shape, and they just want to talk the business up a little bit.
According to their profile, they are competing against NCC, which is struggling, and MTC which is also getting beaten up. Maybe they want to benefit from possible bank runs from those two banks. That money has to end up somewhere.
According to their 10Q they do have about 1.3% nonperforming loans, compared to 1.0% in December, and also, they had a decrease in deposits by $158 million in that time, only a couple of percent, but that could be just the economy slowing down or something. Their competitor NCC which is losing a lot of money, claims to have 3% nonperforming loans at the moment.
Now, it is quite true that even though performing, a lot of these loans could be on the books for a lot more than the underlying property is worth, and in fact, this is likely, but there is no real way to tell on that what is real and what is not, except for believing the officers of the bank when they tell you this is the case.
So unless they know something that we don't, maybe what they are saying is just friendly PR by the officers, and nothing to worry about. Anyway, for every PO.com poster that gets a letter like that, there is a little old lady that says "how nice, my bank is nice and safe" to offset it, so maybe the net impact on deposits is close to zero.