[mike-cardwell]

My tech blog at https://grepular.com/blog/ has about 1100 feed subscribers. About 1000 of them are Google Reader users. I'd be really interested to see what would happen if Google dropped the Reader service. I wonder how many of those people would resubscribe from elsewhere.

[Tooluka]

Nice feature of GReader is that it uses browser native engine with all user mods - adblock, flashblock, greasemonkey, stylish etc. Stand-alones that I've used are mostly Trident (IE engine) so despite their great features they are also annoying.

So for your question - it will take lots of effort to relocate RSS reader and large portion of user base will be lost in transition.