All shipments into the US go through US customs - so there's always a risk of confiscation although I've never heard of anyone actually getting in trouble.

I spend some of my time in the US - not too far from you - and I've never had one of my personal shipments go missing.

The fact that they pack some free items in every shipment so that it doesn't look like just seeds helps out a lot. I think right now they're putting in some pens, a lanyard, some tips & maybe some stickers or something.

The fastest I've had anything arrive is 6 days (total, not business) from the time it was shipped - I've also been able to ship into the UK with a 6-day timeframe.
I've had shipments come from Ireland recently that took 10 days, and last year I ordered something from France off eBay that took about the same amount of time.
I've also had shipments take much longer - most all seed banks say to allow 25 days.

Since we've started international shipping, I haven't heard of anything going into the US that didn't make it to its destination.

However, since you're a forum member, you get special treatment. If you don't get your seeds, let me know & once our shipping department verifies that they didn't arrive, I'll make sure they reship. They use Royal Airsure & that means they're trackable in both the UK & the US.