It really depends on your definition of "active".
By DDO's definition which is used to determine a Guild's Renown bonus/penalties active = Has been online at least once in the past Month {4 weeks 1 day I believe is how DDO measures a month}.
I'd be very surprised if Thelanis doesn't have at least a couple of Guilds that fit that definition for having 200+ active players.
The only way to know for sure would be to be in one of those Guilds.
Though 300+ is extreme Wayfinder supposedly has one with 750+ active accounts. {This still only equates to 20-30 players online in that Guild at one time}.
The difference in total daily population between Sarlona and Ghallanda is around an extra 5%, Between Ghallanda and Thelanis it's another 5% and therefore between Sarlona and Thelanis you're still only looking at 10%.
At any time of day that can be virtually unnoticeable - If Sarlona has 120 people in the Who list at 6am UST while Ghallanda has 105 and Thelanis has 90 would you notice that difference without actually counting every person in the Who List?
At peak hours with 4-500 people online on all three servers you certainly won't notice any difference.
Ghallanda and Sarlona have very different population dynamics to Thelanis.
Ghallanda is heavily European.
Sarlona has a massive Chinese population.
If you're logging on to either Server at US Peak Hours then their who list/LFM page etc. are going to be very similar to Thelanis.
However at off peak hrs there's generally substantially higher numbers of people on those two Servers than elsewhere.
I'd also like to point out that whichever server currently has the default {atm that's Orien} generally has +50% population minimum of the next strongest server {which will usually be the previous server to have the default as it's population - atm that would be Argo}.
Thelanis hasn't had the default in over 4 years - This shows and it seems from what I've been told by at least one Thelanite that the population of Thelanis has fragmented into smaller and smaller Guilds.
By my own count Thelanis actually has the highest number {by some distance - 46 to 35} of Lvl 160+ Guilds, it also has more 150+ Guilds AND 140+ Guilds than any other Server!
If I've missed any I do apologise -
https://www.ddo.com/forums/showthrea...36#post5577736
Strangely however at 190+ and 200 Sarlona, Khyber, Argo AND Cannith are all ahead of Thelanis currently and Ghallanda is equal with Thelanis for 190+ though with less 200s.
Thelanis needs the default badly
Yes when last we could see the actual numbers - I counted them from 22nd April to May 9th, Here they are for those 17 days:
I posted those numbers multiple times and Thelanis may have managed to pull away from Cannith making it seem like Cannith needs the default more Cannith has actually had the default multiple times in the past 2-3 years and I'm sure can wait for Thelanis to have its turn.
Argo {Last default} > Orien {Current} > Thelanis {if I had my way from tomorrow} > Cannith > Khyber > Argo again > Thelanis again > Orien again > Cannith again > Ghallanda > Sarlona > Khyber again would be my proposed defaults for the next two years at 2 months each based on the population trends of the past 4 years.