Current P/E is about 29 but with NPAT growing at 43% -51% it is...

Current P/E is about 29 but with NPAT growing at 43% -51% it is not a demanding P/E.
More importantly, forward P/E is 24. Even if net earnings grow only 30-40% your margin of safety is there.
Is the forward P/E goes back to the current P/E of 29 JBH will trade above $13.

A low dividend yield means nothing in a company that is growing quickly. Rather they invest profits back into growth than pay share holders a high dividend. Mature companies or those that can't find growth pay high dividends. Outperformance via capital growth is just as good.
BHP has a dividend yield of 1.4%.

The more significant aspect of the recent profit upgrade is that trading has been stronger than expected from February until now. Sit and think about this for awhile. This is the weakest time for shoppers.
Next half we got people getting their tax return and then Christmas shopping starts. JBH is poised for more outperformance, imho.

Being a retailer obviously JBH is more risky than some other stocks such as WOW or CBA. Hence it has a higher beta. Any bad announcement by JBH will see it get smashed. But as long as the bull market continues and management make the right decisions JBH will continue on its merry way and that's up.

The high AUD is just the icing on the cake