[c-nsp] Limits of STP/RSTP/REP?

[Garry]

Wondering, what's the sensible limits of STP, RSTP, REP or any other
spanning tree/ring protocol available on Cisco switches like 29, 35, 37
or ME3400 series? I was told by a customer whom we try to sell some
Cisco gear that beyond anything like 4 or 5 switches in a ring,
recognition/recovery times of the ring would quickly go well beyond 10s
on failure of a link ...

Now, on STP the times are definitely somewhere in that range, but what
about RSTP or stuff like REP?

Tnx, -garry