Boy, you guys made me work!

I've been getting the new site in Firefox (up to date), which has always been my browser. So to answer the question more fully, I tried logging in with Chrome on the same computer. Chase required me to do two-step verification because they didn't recognize "my computer" they said (same computer, just different browser, dummies ).

Anyway, I got the new site in Chrome too after logging in.

So maybe they're rolling this out on a user-by-user basis, as someone up above theorized, or a region by region basis (Chase knows where you are geographically when you log on, don't they?), I dunno. For the record, all my logins since I've seen this change have been in SoCal.