I'd have to disagree with that thought Anton. I play both tbs and rts strategy games, and while there is a distinct difference, I'd rank rts games about the same as I'd rank tbs ones.
You get a different kind of fun out of rts games than tbs games. In rts games, there is more urgency to the game. In tbs games, you don't feel rushed, but in rts, whether your playing against a computer or live opponent(especially a live opponent) you feel like you have to move as fast as possible, and that is fun in itself.
While their may not be as much strategy in an rts game as a tbs game, rts games are not all "who clicks the fastest". I play rise of nations a lot, and with the new additions such as borders, you are kept on your toes having to THINK about where you should place your next city, or where to place a fortress. There's also army balance. RON requires you to build a balanced army to win a battle. Rushs with just one type of units usually doesn't work(except in the very early game).
For example, if your in the gunpowder age, building just arbesquiers(offensive unit) to attack is easily countered by the enemy sending in several cavalry units. If you had built say, landskneschts(german defensive units) you would have been able to easily defend easily against the cavalry units.
Also, in one of the older strategy games I've played, Outpost 2, the game required some real thinking and strategy. There was no fog of war, so you and your opponent could see exactly what each other was doing. There was a time cycle of day and night, so if you wanted to attack, you would do it during the night. The opponent wouldn't see your units on the minimap if you attacked at night with the lights off(In the game of course). There was a massive tech tree, probably larger than the one in galciv itself, so if you were to rush the enemy, and he was more advanced than you, you would usually be crushed. You would have to do some careful micromanagement to actually defeat your opponent. You could also build defensive walls and turrets in strategic places. Not only this, but you would have to keep your morale up with residences and hospitals. Don't tell me that this game was as easy as "snap".