It's important to remember that it's only been 6 games, and although it seems like much of the same it's really quite a bit different under the hood.
Without looking it up I think we were getting outshot by an average of 5 or 6 shots a game last year under Lambert. Right now we're outshooting teams by 8 shots, and that doesn't include all the posts they've been hitting. You outshoot the opposing team by 30% and you're going to win more often than not - especially with Vezina caliber net minding behind it.
The thing that has been neutralizing them is that they're shooting like 6.5% on the season. To put that into perspective, no team has had a shooting percentage that low in the last 25 years. League average has been around 10% for the last few years, and that's where the Isles usually land. It's the kind of stat that always normalizes with a larger sample size.
Had they been shooting 10% to this point they're probably 4-1-1 and we're all jumping for joy. So I know it feels like the sky is falling because of the way the losses have happened, but unless you actually think they're going to be shutout every other game for the rest of the year things should be fine.