If the 1pt spreads had been a huge loss-maker for WS then they'd have stopped it by now. Strange that the others haven't followed suit after six months, though. Capital Spreads ads keep going on about the tightest spreads, so why don't they match the offer?
If WS's platform is up to speed now, all it needs is a few tweaks to make it more user-friendly, i.e. easier closing of positions, improved orders, and an indication that a stop has been hit, so you don't open new bets accidentally. Charts would be useful, too, but I suppose they have to save money somewhere. Given all that, traders would stampede away from CS, IG, CMC, etc until 1pt spreads became the new standard, and we'd all lose a little less money!