Yes (as per my quote from 5/29), Hillary supporters should absolutely take the news as a clear message from establishment Democrats, that they have you covered, and there's no need to head out to the polls tomorrow, and show your support for Hillary.
I think the establishment got a serious case of the jitters here, with the "big enchilada" (CA) voting tomorrow, where the recent polls show Bernie has caught right up, and what they don't seem to appreciate is, that by declaring victory before the voters in the nation's most populous state, plus five others, have had a chance to express their view, will likely rile up Bernie supporters, no end, and this will make them even more determined to make their mark.
This could be the defining blunder of the campaign, and might just be the "small miracle" Bernie needed
.