Not sure what I'd base excessive optimism on at this stage. Out of 5 games so far the Cronulla and Canberra performances were poor and against Melbourne we found a way to lose instead of securing a big win. That hardly constitutes overwhelming early season form.
If anything, the indications remain strong that we are vulnerable if any of SJ, Egan or AFB go down, and to an extent CNK (with complications around whether RTS subs in for him or not) and Harris.
General signs are we're building in to the season pretty nicely and hopefully that will continue if we avoid major injuries. In terms of direct comparisons with the top sides, we're currently looking pretty good as Melbourne, Penrith and Brisbane have all been hit hard by key injuries so far. However, there still isn't really anything to suggest we are as good as Walsh/Mam/Reynolds/Haas/Carrigan Broncos, or Edwards/Luai/Cleary Panthers, or even Papi/Munster/Hughes/Grant Storm.
Really, it's all been unfair comparisons across the comp so far, and it's possible we might benefit from that longer term. Brisbane's season for example could end up in disarray if their injury woes don't improve. I think that's about all you can say so far, that if we have all our guns and are playing someone who doesn't, we're a good chance.