Just gave it a try with one torrent.
Leeching:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4212 **** 20 0 103m 34m 18m R 38.4 2.7 1:30.64 tixati
Seeding:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4212 **** 20 0 105m 35m 19m S 7.0 2.9 2:09.64 tixati
Same torrent with Transmission:
Leeching:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4246 **** 20 0 115m 32m 21m S 12.9 2.5 0:06.75 qtr
Seeding:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4246 **** 20 0 115m 32m 20m S 1.6 2.6 0:30.24 qtr
Both clients working under KDE4, i686 compiled. That client needs too much cpu-power imho for leeching. Oh, and Tixati needs 15MB space, transmission 1MB

The client itself looks okay, but the CPU-usage for leeching is just a no-go imho.
(Yeah, i know, a test with 10+ torrents would be better, but i'm too lazy to test a client so heavily... if someone wants to give it a try, be my guest

)