No, Remilia won. She needed 13,700 points to pass Youmu. Akyuu and Marisa called riichi which lowered the value she needed to 11,700 (You place a 1,000 point stick on the board when you declare riichi and whoever wins the hand wins that stick, so 2 of those is 2,000). She then landed a direct hit on Youmu for 6,400 (Patchouli mentions this at the end). Youmu losing 6,400 and Remilia gaining 6,400 is a difference of 12,800 at the end which is enough for Remilia to barely pass Youmu by 1,100 (Patchouli also mentions this). This is probably also why, "Youmu's been off since the big tournament" according to the Cirno cup players.
Also to explain why Remi's hand that was previously worth "2,600" according to Aya is worth 6,400 now.
Han
Green dragon/hatsu
South wind/nan
Under the river/haitei (calling ron on the last discarded tile)
3 han
Fu
20 (Automatic)
4 (Open honour triplet)
8 + 8 (Closed honour/terminal triplets)
2 (Kanchan, middle wait on 5-7)
42 fu total rounding up to 50 (You always round up for some reason)
So 3 han 50 fu, 6400
I won't get into why 3 han 50 fu is 6.4k, the calculations are a pain even if you've played riichi mahjong for a long time (people usually memorise the table because of how much of a pain they are) but that's the gist of it.