Can i see if a site is a zen site

Is it possible to find out if a store is using zen-cart ?
I am not wanting to rip apart their template or anything, I just like the way their categories are set up and would love to do mine that way. I have searched on this forum to find threads on setting up the categories and the threads always say no, but this site kinda has a zen feel and so was wondering if they had got round it somehow.
I would rather not post their link if thats ok .. but basically the top level categories are headings (not linked) and the 2nd level categories are under these headings as links. They are always expanded which is where the threads i have read say it isnt possible with zen cart. I have better categories and sideboxes installed on my site, but cannot see anything on there to help.
Am i making sense or am i wafflin lol
Any help you could give would be brill
Erica xx