Hi Great Fence,
I am only speaking from experience. I am not saying there will definitely be a dip. I am saying that anyone who is replatforming, particularly if they are re-writing URLs, they need to be prepared for a dip Perhaps it has to do with changing servers where your site is located (if I was Google, that would be a significant part of the equation).
There are no guarantees for sites one way or the other.
As a SEO who specializes in e-commerce I just want to make people aware that re-platforming might now solve all of your SEO woes overnight. You have to be patient.
Great Fence...if that 3-month dip led to double the traffic and conversions that you had before you re-platformed then it would all be worth it wouldn't it?
Some platforms are definitely better than others, but you need to be prepared to sacrifice a little and wait out the dip. If you've researched your choice well enough and made it taking into consideration your overall business goals, you should be fine.
I know that's not 100% reassuring, but if your business model is solid and your [products are good, you should be okay.
Dana
