QUOTE(Credzba @ Jan 13 2008, 12:23 PM)

The process is 3 phases.
1) USCIS - validation of valid petition. This takes the same no matter what as far as I can tell. A guy I know files his k1 2 weeks before I filed my I-130, we received our noa2 almost exactly 2 weeks apart.
2) NVC - K petitions pass thru here in a few weeks, I-130 takes months. The reason is the fee payment and application portion takes place in the US for I-130 instead of in applicants home country for K visas.
3) Application - K Visas receive 2 packets, a "p3" which is the application, and a "p4" which is interview date. I-130 visas receive only the "p4".
So, really the major gains to the K visas is in the mail turn around for the p3 packet. The I-130 visas may take as long as 6 months (looks at some peoples timelines) in NVC because of the awkward way it is processed. No fewer than 3 round trip mail cycles are involved, and each return to NVC takes about 2 weeks for them to process.
The P3 on the K visas is a single packet, mailed from the embassy to the applicant.
If you read here in the NVC forum there are some time savers that can significantly reduce your NVC timeline.
My wife for instance never received her ds-3032, if not for the email shortcut I'd still be in step one of nvc processing 3 months later.
If you utilize the shortcuts though, you can get through NVC in about 3 months.
That is still longer than the 1-2 months the p3 for K visas takes, but you get the benefit of an imigration visa, the american petitioner pays the fees, and files the paper work.
So, yes the I-130 is still slower than the K visas, but not by a lot, especially if you utilize the short cuts.
Best of luck to you.
The above pretty much spells it out. All this "same time to process" talk only refers to the initial petition approval at a USCIS service center. If your wife will be interviewing in Canada, there is an additional consideration, however. The wait for a CR1 interview in Montreal is significantly longer than the wait for a K3 interview in Vancouver, so you'll want to weigh how that impacts your case as well.