I find that when discussing the difficulty or lack thereof of 4E, especially its published adventures or official encounter design advice, it's important to note that there's a very wide range of possible "power levels" for the PCs. This is true of most RPGs, of course, and was definitely true in (at least) 3.x D&D as well.
I've been thinking - could it be that 'earlier' monsters suffers more than those designed later? It's no secret that WotC's design skills with 4E has improved since the MM1.
So it this true? Orcus gets owned (which is why they beefed him up in E3), and Torog is bad news (as presumably Lolth will be)?
Is that really the case, though?Another thing is that monsters in the Paragon and Epic tiers just don't do enough damage. WotC seems to have come to this realization as all of the higher level monster previews have significantly higher damage values.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.