No, that wasn't the argument put forth earlier by FireLance, he made a general statement about options with melee monsters and NPC's in 4e vs. 3.x.
Okay, I'm going to cite some concrete examples, here. If you wish to pursue this line of argument, please feel free to cite your own. Let's look at some monsters starting with the letter "B":
Barghest (3e): Bite (Atk); Bite and claws (Full Atk); Various spell-like abilities (
blink,
levitate,
misdirection,
rage,
charm monster,
crushing despair,
dimension door)
Barghest Savager (4e):

Bite;

Battleaxe;

Jump Strike;

Power Feed; Change Shape
Here is one example of how a spellcaster-type monster got its power list trimmed down.
Basilisk (3e): Bite (Atk); Petrifying gaze (SA)
Stone-Eye Basilisk (4e):

Bite;

Petrifying Gaze
Here, there is virtually no difference in terms of combat options. The same goes for the other 4e basilisk, the Venom-Eye Basilisk.
Behir (3e): Bite (Atk); Breath weapon (SA); Constrict (SA); Improved Grab (SA); Rake (SA); Swallow Whole (SA)
Behir (4e):

Claw;

Bite;

Devour;

Lightning Breath;

Thundering Stomp
Again, the two have an approximately similar number of options, especially when you take into account the fact that in 3e, Improved Grab triggers automatically on a successful Bite and be considered a subset of that ability.
Bodak (3e): Slam (Atk); Death gaze (SA)
Bodak Reaver (4e):

Greataxe;

Death Gaze
Once again, there is very little difference in terms of combat options. The other 4e bodak, the bodak skulk, is a lurker and has an additional option to turn invisible and gain the insubstantial and phasing qualities.
Bralani (3e):
+1 holy scimitar or
+1 holy composite longbow (Atk); Whirlwind blast (SA); Various spell-like abilities (
blur,
charm person,
gust of wind,
mirror image,
wind wall,
lightning bolt,
cure serious wounds)
Bralani of Autumn Winds (4e):

Longsword;

Autumn Chill;

Whirlwind Blast; Fey Step
Here is another example of a primarily spellcasting creature that got its combat options reduced.
Bugbear (3e): Morningstar or javelin (Atk)
Bugbear Warrior (4e):

Morningstar;

Skullthumper; Predatory Eye
Here is one example of a primarily melee monster that had its number of combat options increased. The other 4e bugbear in the MM, the bugbear strangler, gets Morningstar, Predatory Eye and two other, related combat options (Strangle and Body Shield).
Bulette (3e): Bite (Atk); Bite and claws (Full Atk); Leap (SA)
Bulette (4e):

Bite;

Rising Burst;

Earth Furrow; Second Wind
Here's another primarily melee monster that was given more combat options in 4e.
So, to recap, for the SRD monsters starting with the letter "B":
Increased combat options: Bugbear, Bulette - primarily melee monsters, IMO
Decreased combat options: Barghest, Bralani - primarily spellcasting monsters, IMO
About the same number of combat options: Basilisk, Behir, Bodak - monsters with signature magical abilities.
Not (yet?) converted: Belker, Blink Dog
And before you asked, I picked "B" because it was the first file I opened (the "A" monsters were in a file entitled "MonstersIntro-A") and the list of monsters was fairly short. I do have a life outside of ENWorld, you know.
