I did a little calculation and based upon current difficultly (big caveat!) the Ant's ROI in around 63 (included PSU and import duty into UK) days and the 750GH/s in around 61 days. Obviously having 1 box rather than 4 makes life a lot simpler.
Did you set the calculator for mid-April at a minimum? Because according to BitcoinUltra's post they just finally finished testing and manufacturing PCB's. Seems like something that should've been done awhile ago. They haven't even showed any pictures of chips or a test rig mining at a pool yet!

Again, playing devil's advocate here. Not having shown it and not having done it are different. They couldn't have finalized their board design much before this, since the A1 chips haven't been out that long. They said they had sent them to production, and had all the necessary components.
Yeah, they probably should shoot the bins of components and post up the image just to stop trolling and slow speculation, but I wouldn't want to be bothered either. They have 19 days to meet their self imposed deadline. I won't call them on anything else until that deadline has passed. I wish they hadn't gone the pre-order route, but they did. Only by a few weeks, though, rather than some pie-in-the-sky date that they pulled out of their ass like several other manufacturers/vendors have done.
The A1's are out there, both Swiss and chinese knockoffs. They work. Let's see what these guys do with 'em.