Lotta ppl with a lotta diff opinions on what NA teams are t1 and not. Here's my take and feel free to post yours. I include definite tier 1 and the in-between teams (basically tier 1.5 or lower tier 1)
Tier 1:
SEN
NV
100T
XSET
V1
LG
C9B
Tier 1.5:
Gen.G
FaZe
T1
TSM
ABX
Top of Tier 2:
Rise
KCP
DZ
Immortals
NRG
Soniqs
DZ
BBG
I think Gen.G, T1, and TSM have shown enough potential to be solid tier 1 in the near future. Also Rise, KCP, and DZ could very easily slip into the "1.5"/"lower tier 1" category soon.