OSX Lion, delays when opening certain docs on NAS

I haven't seen anybody else discussing this, but it's so noticeable to me I find it hard to believe nobody else has noticed it.

The setup:
Mac Pro running OSX 10.6.8
MacBook Pro running OSX 10.7.1.
ReadyNAS Pro Business RAIDiator 4.2.19

With the Snow Leopard Mac, if I double-click on a TextEdit document or a document that Preview can open (jpeg, pdf) that's located on the ReadyNAS, it opens almost instantly.

With the Lion Mac, if I double-click on the same kinds of documents located on the ReadyNAS, there's a delay of between 7 and 15 seconds before the document finally opens. It's annoying because I know how fast accessing the ReadyNAS can be.

After playing with this for a while, I'm reasonably sure this has something to do with Lion's new Versions feature (I don't think it's a ReadyNAS problem/bug). TextEdit and Preview are both Versions-capable apps in Lion. Documents belonging to non-Versions-capable apps (Microsoft Word, for instance), still open almost instantly in Lion for NAS-located documents.

In the case of Lion, I think Lion is creating a new version or trying to access previous versions of the document during the delay between double-clicking and opening.

I tried disabling local snapshots with:

sudo tmutil disablelocal

But that made no difference. I tried disabling Restore/Resume for TextEdit with RestoreMeNot (http://www.restoremenot.info/download/RestoreMeNot.zip) but that didn't make any difference, either (I was pretty sure it wouldn't).

I think it may be possible to disable or hinder Versions
http://applehelpwriter.com/2011/09/16/t ... s-sort-of/

but it's a fairly radical procedure and I'm not sure it's advisable.

Q: Has anyone else noticed this behavior with Lion?
Q: Is the double-click delay just something we're going to have to live with going forward with Lion and any Versions-capable documents?