PSR tier is pretty meaningless. When it was first implemented, I languished in tier three for absolute ages, while complete newbies raced past me, because their PSR changes were being amplified by a new-player seeding effect. As a result, tiers one through three are all kind of a hodge-podge of skill levels. Tiers four and five are more heavily stacked with new players and a few unlucky souls who didn't escape, prior to exhausting whatever PGI considers to be their early matches.
Not only is PSR meaningless as a measure of skill, it's also meaningless in terms of the game's matchmaker. To reduce queuing times, PGI recently eased matchmaker restrictions, so that the only tiers that are not supposed to be matched against each other are one and five, and there's evidence to suggest that even that restriction isn't absolute.
But to the point, yes, both myself and Captain McNoLegs there are both in tier two.
Btw, I've created this google form. Since im not an english native, i had major struggles with MWO slang (I started playing 1y3m ago).
People already contributed, if you notice something is missing, please add on the form
I added entries for 'Splat,' 'Dakka,' and 'Mordor,' since those were notably missing. I'll keep that sheet in mind, as it does look like it could be a useful resource for non-English speakers.