Yep...I've looked at E signal too. I have three puters for my trading station and I have compared them too. It's AMAZING how far off the various feeds can be.
I see trades go through on one that don't even show on another. Volume data is off, it's really pretty poor considering they are all supposed to be linked to the same feed from the market. I guess it all depends on how much bandwidth the provider you are using has. E signal is probably using a T-1 line because they are by far the fastest. I've been procratinating about switching but this little chat has motivated me to get busy...LOL