This is a little expriment where I took three popular decks and rated them based on Draws/Searches, Summons, and Destructions. In this experiment, T.G. Agents, Inzektors, and Dino Rabbit builds were tested for 3 duels, with 4 rounds each. A round was considered to be from the start of the turn of the player with the deck being tested, to the end of the turn of the opponent (so two turns).
Draws/Searches are any draws or cards added to the hand. This includes the draw during the draw phase, draws from Maxx "C", Pot of Duality, Pot of Avarice, etc.
Summons include Normal and Special summons, but not Sets. The Rescue Rabbit summon and effect counts as three summons for the turn. And XYZ or Synchro Summon of course counts as an additional Special Summon.
Destruction effects include things like Master Hyperions, Inzektor Hornet, MST, etc. Battles do not count towards Destructions.
The results (in average Draws/Summons/Destructions per round) are displayed as follows:
As you can see, Dino Rabbit has a high draw and summon power, but lacks in destruction ability. However, Dino Rabbit usually relies on stalling and negations. The draw power is most likely due to the Pot of Dualities, Pot of Avarice, and Gold Sarcophaguses. And while the Dino Rabbits have huge Summoning power, they have very little field presence and destructive power.
The T.G Fairy Agent deck on the other hand is very little destructive power, even though Master Hyperion has a destruction effect.
Lastly, the Inzektor deck is pretty even all around. They have a great draw strength due to Inzektor Centipede, Pot of Duality, and Zektkaliber. The summoning strength is fairly high due to Inzektor Dragonfly, Dark Armed Dragon, and Call of the Haunted. And of course, the Hornet can obliterate a whole field if done right.
It appears that Inzektor decks do so well due to their well rounded abilities. They have great draw, summoning, and destructive strength; allowing them to set up and adapt to any situation.
Dino Rabbits are up there as well due to their summoning power and the searching power. However, they lack in destructive ability, which may be made up with stalling ability.
The next analysis I do, I'd like to include field presence, since a deck can special summon a ton during one turn, but only end up with one boss monster on the field. This is similar to how the Dino Rabbit deck works since it takes quite a few summons to get Laggia on the field.
Another dimension I'd like to test is negations, since the T.G. Fairy Agent deck is packed full of negation abilities, while the Inzektor deck has very little and the Dino Rabbit lies in the middle with Laggia and Dolka.