It's impossible for me to determine whether or not you were visibly lagging, nor whether or not the admin was justified in kicking you and not the other player, but it is entirely possible that you were lagging more than he was, despite your latency was much lower (note, latency is different from ping; see this informative article).

The ease of manipulating displayed latency by ping-masking and the general unreliability of using latency values as a definitive indicator of lag require administrators to use their judgement on a case-by-case basis rather than going by the numbers. If ping is over 300-400 or so, the player will certainly be lagging a bit, but they could well be lagging less than a player with a ping of 100. In addition, issues like low client-side FPS will raise latency, and having improper cvars (rates) can cause visible stuttering even if the player's system and connection are up to par.

So although I can't comment on whether or not the administrator's actions were justifiable in this particular case, please keep in mind that their subjective judgement is required per lag.

---------- Post added at 08:49 PM ---------- Previous post was at 08:41 PM ----------

Edit: Well, now that I know that the admin in mention was Cyber, I'm entirely sure his judgement was sound and qualified. I trust his judgement. (Except on me, because he thinks I'm the dirtiest hacker of them all.)