Yes, generally speaking any delay in info showing in Webdash would be because the data file it picks up from the HG servers is stale. Also as Salek says, timestamps may be wrong if the server times themselves are off.
Possibility of (OOG) out of game inventory adjustments? OOG market selling and buying? OOG Character creator program?
Seems like a *lot* of work for very minor benefits.
It does - that said, given proper security we could certainly consider a way to do OOG market and character creation, at least. Almost certainly not inventory adjustments, however (far too fragile with the way NWN works). Very low on our plates, because again it would be a *lot* of work.
When I first wrote HG Webdash, I was HTML scraping existing pages that listed servers, players etc. I eventually got connected to Yomi, who pointed me to some XML files/feeds, which I used to build the current version of Webdash. Some data (Quests, Market Listing) aren't (weren't) available in XML feeds, and I didn't bother to HTML scrape those pages, opting instead to just include them as you see them now.
With the resurgence of activity on the HG world, I'd love to take a pass at upgrading and adding to the webdash. I usually ping Funky once a year to see if there's anything I can tap into and add to the webdash. If quests/status was available via XML for example, I'd do a page for those.