Here's an example of crosstalk. This is the original image before the glasses:
This is the JVC RS45 with the glasses activated, photographed through the left eye of the glasses. Notice the left side of the tree has double image.
Here is the BQ W7000, the 3D DLP's have a unique ability to completely avoid all signs of x-talk due to high speed of the panels.
To answer your question, x-talk is not an issue on the 5030 from my perspective, it performs very well for a non-DLP. There were reports in the past about 5010's and 5020's increasing the x-talk as the lamp ages. The older JVC's were prone to the same issue. We'll have to wait and see if this shows up again as the hours accumulate on these new releases.
The Epson is also better (less x-talk) than Sony and JVC (current models HW50, RS46/RS4810) with Side by Side material.
What's impressive is the color calibration capabilities of the 5030. I can nail the grayscale (in 3D as well), default gamma is very good and so is the color gamut with surprisingly low dE's from the factory. The Sharp isn't as lucky and needs an external processor (mini 3D lumagen) to reign in the color gamut. It does have excellent 3D though.